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Historical Data 1931 - 1977
Nonmetal Mines and Mills


TABLE 19 - Injury experience and worktime data at nonmetal mines
           and mills in the United States, 1931-77

                                     Injuries
Year                  Nonfatal            All           Non-            All
          Fatal      disabling      disabling      disabling       injuries

1931        11            841            852             NA            852 
1932         7            528            535             NA            535 
1933         8            745            753             NA            753 
1934         8            787            795             NA            795 
1935         7            813            820             NA            820 
1936         4          1,044          1,048             NA          1,048 
1937        13            987          1,000             NA          1,000 
1938         6            726            732             NA            732 
1939        10            719            729             NA            729 
1940        14            826            840             NA            840 
1941        17          1,182          1,199             NA          1,199 
1942        22          1,537          1,559             NA          1,559 
1943        25          1,471          1,496             NA          1,496 
1944        17          1,283          1,300             NA          1,300 
1945        16          1,145          1,161             NA          1,161 
1946        26          1,369          1,395             NA          1,395 
1947        12          1,308          1,320             NA          1,320 
1948        15          1,176          1,191             NA          1,191 
1949        10          1,125          1,135             NA          1,135 
1950        19          1,238          1,257             NA          1,257 
1951        17          1,351          1,368             NA          1,368 
1952        14          1,171          1,185             NA          1,185 
1953        22          1,419          1,441             NA          1,441 
1954         9            956            965             NA            965 
1955        22          1,607          1,629             NA          1,629 
1956        24          2,193          2,217             NA          2,217 
1957        19          2,624          2,643             NA          2,643 
1958        24          2,445          2,469             NA          2,469 
1959        22          3,228          3,250             NA          3,250 
1960        32          2,850          2,882             NA          2,882 
1961        21          2,541          2,562             NA          2,562 
1962        23          2,327          2,350             NA          2,350 
1963        33          2,333          2,366             NA          2,366 
1964        24          2,486          2,510             NA          2,510 
1965        31          2,472          2,503             NA          2,503 
1966        27          2,622          2,649             NA          2,649 
1967        30          2,551          2,581             NA          2,581 
1968        39          2,472          2,511             NA          2,511 
1969        27          2,361          2,388             NA          2,388 
1970        28          2,394          2,422             NA          2,422 
1971        24          2,308          2,332             NA          2,332 
1972        17          1,969          1,986             NA          1,986 
1973        23          1,436          1,459          1,183          2,642 
1974        19          1,468          1,487          1,222          2,709 
1975        25          1,524          1,549          1,136          2,685 
1976        22          1,507          1,529            790          2,319 
1977        16          1,539          1,555            777          2,332 

NA Not available. 

                         Frequency rates per
                           million man-hours 
Year                  Nonfatal            All           Non-            All
          Fatal      disabling      disabling      disabling       injuries

1931      0.61          46.88          47.49             NA          47.49 
1932      0.59          44.65          45.24             NA          45.24 
1933      0.57          52.71          53.28             NA          53.28 
1934      0.53          51.82          52.35             NA          52.35 
1935      0.43          50.28          50.72             NA          50.72 
1936      0.19          48.43          48.62             NA          48.62 
1937      0.63          48.06          48.69             NA          48.69 
1938      0.34          40.72          41.06             NA          41.06 
1939      0.58          41.61          42.19             NA          42.19 
1940      0.74          43.50          44.24             NA          44.24 
1941      0.73          50.89          51.63             NA          51.63 
1942      0.78          54.71          55.49             NA          55.49 
1943      0.89          52.54          53.43             NA          53.43 
1944      0.66          49.81          50.47             NA          50.47 
1945      0.65          46.52          47.17             NA          47.17 
1946      0.97          50.94          51.90             NA          51.90 
1947      0.42          45.40          45.82             NA          45.82 
1948      0.54          42.33          42.87             NA          42.87 
1949      0.37          41.75          42.12             NA          42.12 
1950      0.67          43.51          44.17             NA          44.17 
1951      0.56          44.84          45.40             NA          45.40 
1952      0.48          40.44          40.93             NA          40.93 
1953      0.72          46.54          47.26             NA          47.26 
1954      0.30          32.34          32.64             NA          32.64 
1955      0.43          31.55          31.98             NA          31.98 
1956      0.32          29.38          29.70             NA          29.70 
1957      0.19          26.87          27.07             NA          27.07 
1958      0.23          23.11          23.33             NA          23.33 
1959      0.17          25.41          25.58             NA          25.58 
1960      0.26          23.13          23.39             NA          23.39 
1961      0.18          21.27          21.45             NA          21.45 
1962      0.21          21.73          21.94             NA          21.94 
1963      0.30          21.51          21.81             NA          21.81 
1964      0.22          23.14          23.36             NA          23.36 
1965      0.29          22.73          23.02             NA          23.02 
1966      0.24          23.04          23.27             NA          23.27 
1967      0.28          23.75          24.03             NA          24.03 
1968      0.39          24.87          25.26             NA          25.26 
1969      0.27          23.90          24.17             NA          24.17 
1970      0.30          25.28          25.57             NA          25.57 
1971      0.28          27.39          27.67             NA          27.67 
1972      0.23          27.09          27.32             NA          27.32 
1973      0.32          20.27          20.59          16.70          37.29 
1974      0.25          19.57          19.82          16.29          36.11 
1975      0.32          19.59          19.92          14.61          34.52 
1976      0.28          19.33          19.62          10.14          29.75 
1977      0.20          18.89          19.09           9.54          28.63 

NA Not available.  

                         Severity rates per
                           million man-hours 
Year                  Nonfatal            All      Man-hours
          Fatal      disabling      disabling         worked
                                                 (thousands)
1931     3,679             NA             NA         17,941 
1932     3,552             NA             NA         11,825 
1933     3,396             NA             NA         14,134 
1934     3,161             NA             NA         15,187 
1935     2,598             NA             NA         16,168 
1936     1,113             NA             NA         21,556 
1937     3,798             NA             NA         20,536 
1938     2,019             NA             NA         17,827 
1939     3,472             NA             NA         17,281 
1940     4,424             NA             NA         18,988 
1941     4,392             NA             NA         23,225 
1942     4,699             NA             NA         28,093 
1943     5,357             NA             NA         27,999 
1944     3,960             NA             NA         25,760 
1945     3,900             NA             NA         24,613 
1946     5,804             NA             NA         26,877 
1947     2,499             NA             NA         28,809 
1948     3,239             NA             NA         27,784 
1949     2,226             NA             NA         26,948 
1950     4,006             NA             NA         28,456 
1951     3,385             NA             NA         30,130 
1952     2,901             NA             NA         28,954 
1953     4,330             NA             NA         30,488 
1954     1,827             NA             NA         29,564 
1955     2,592             NA             NA         50,936 
1956     1,929          1,386          3,316         74,639 
1957     1,168          1,122          2,290         97,642 
1958     1,361            977          2,338        105,809 
1959     1,039          1,027          2,066        127,039 
1960     1,559            975          2,534        123,191 
1961     1,055            994          2,049        119,442 
1962     1,288          1,113          2,402        107,105 
1963     1,825            687          2,512        108,483 
1964     1,340          1,160          2,501        107,438 
1965     1,711          1,339          3,050        108,735 
1966     1,423          1,167          2,591        113,814 
1967     1,676            890          2,566        107,400 
1968     2,354            980          3,334         99,414 
1969     1,640            948          2,587         98,799 
1970     1,774          1,143          2,917         94,707 
1971     1,709          1,281          2,989         84,278 
1972     1,403            919          2,322         72,686 
1973     1,948            960          2,908         70,851 
1974     1,520          1,130          2,649         75,015 
1975     1,929          1,062          2,991         77,779 
1976     1,694            984          2,677         77,943 
1977     1,179          1,251          2,430         81,457 

NA Not available.

1/ Data for mill auxiliary works not available prior to 1944.