Mine Safety and Health Administration (MSHA) - Mining Industry Accident, Injuries, Employment,and Production Statistics Historical Data - Table 03. Average Number of EMPLOYEE Hours at Metallic Operations in the United States, by Primary Activity, 1978-2006

Table 03. Average Number of EMPLOYEE Hours at Metallic

Operations in the United States, by Primary Activity, 1978-2007

Year	Underground Mines			Surface Mines
	Underground	Surf at UG	Total	Strip	Dredge	Other	Total
1978	36,742,707	8,038,701	44,781,408	48,522,531	805,528	138,549	49,466,608
1979	38,831,160	9,207,178	48,038,338	52,662,353	708,135	136,834	53,507,322
1980	38,307,900	10,283,340	48,591,240	49,575,691	689,497	200,024	50,465,212
1981	38,686,156	10,740,801	49,426,957	51,874,766	665,049	31,442	52,571,257
1982	24,357,362	7,256,644	31,614,006	30,279,970	696,794	12,996	36,989,760
1983¹	16,361,866	5,277,736	21,639,602	23,640,652	682,118	-	24,322,770
1984	16,426,707	4,225,864	20,652,571	22,978,455	668,343	-	23,646,798
1985	14,298,452	3,644,977	17,943,429	19,640,548	682,147	-	20,322,695
1986	13,060,046	3,156,922	16,216,968	19,055,356	790,254	-	19,845,610
1987	13,010,347	3,155,772	16,166,119	21,934,385	968,112	-	22,902,497
1988	14,713,725	3,497,822	18,211,547	27,417,137	1,124,143	-	28,541,290
1989	14,865,632	3,870,086	18,735,718	31,944,491	1,002,126	-	32,946,617
1990	14,923,497	4,105,080	19,028,577	34,982,186	937,034	-	35,919,220
1991	13,183,883	3,580,859	16,764,742	34,990,660	843,877	-	35,834,537
1992	11,452,301	3,657,552	15,109,853	34,140,305	856,839	-	34,997,144
1993	10,223,218	3,149,483	13,372,701	34,466,673	845,110	152,202	35,463,985
1994	10,668,653	2,687,313	13,355,966	33,080,463	703,042	1,350,270	35,133,775
1995	11,744,082	2,836,751	14,580,833	35,003,079	721,156	1,446,697	37,170,932
1996	12,189,920	2,809,491	14,999,411	36,794,604	799,379	1,227,202	38,821,185
1997	12,472,635	2,700,358	15,172,993	34,636,009	790,174	1,049,565	36,475,748
1998	11,523,977	2,258,278	13,782,255	30,597,427	670,379	578,780	31,846,586
1999	9,895,473	1,968,286	11,863,759	27,444,739	631,235	460,252	28,536,226
2000	8,813,437	2,034,500	10,847,937	24,931,485	566,542	478,181	25,976,208
2001	8,902,189	1,728,611	10,630,800	23,295,019	469,091	220,635	23,984,745
2002	7,438,917	1,401,704	8,840,621	19,801,231	429,121	119,294	20,349,646
2003	7,231,668	1,471,194	8,702,862	18,424,119	396,968	88,949	18,910,036
2004	7,619,658	1,579,432	9,199,090	20,462,346	208,944	124,258	20,795,548
2005	8,362,302	1,648,862	10,011,164	21,352,736	207,236	176,821	21,736,793
2006	9,149,807	1,788,270	10,938,077	23,829,786	212,776	283,975	24,326,537
2007	10,873,661	1,855,460	12,729,121	26,615,585	217,310	246,076	27,078,971

Table 03. Average Number of EMPLOYEE Hours at Metallic

Operations in the United States, by Primary Activity, 1978-2007 – continued:

Year	Total Mining	Indp Shops/Yrds	Mills	Total w/o Office	Office	Grand Total
1978	94,248,016	5,138,448	56,781,578	156,168,042	22,191,239	178,359,281
1979	101,545,660	4,308,755	64,360,622	170,215,037	23,446,331	193,661,368
1980	99,056,452	2,554,817	62,302,837	163,914,106	23,660,379	187,574,485
1981	101,998,214	2,853,657	67,950,957	172,802,828	24,320,947	197,123,775
1982	62,603,766	1,457,951	43,777,555	107,839,272	18,111,915	125,951,187
1983¹	45,962,372	1,497,871	35,730,550	83,190,793	13,282,409	96,473,202
1984	44,299,369	1,783,129	36,561,568	82,644,066	11,097,975	93,742,041
1985	38,266,124	1,646,531	31,735,952	71,648,607	9,359,283	81,007,890
1986	36,062,578	1,104,026	27,789,010	64,955,614	8,508,370	73,463,984
1987	39,068,616	1,143,877	31,396,059	71,608,552	8,823,654	80,432,206
1988	46,752,837	737,820	35,964,028	83,454,685	10,255,564	93,710,249
1989	51,682,335	754,830	40,484,259	92,921,424	11,712,040	104,633,464
1990	54,947,797	761,764	41,102,365	96,811,926	11,912,388	108,724,314
1991	52,599,279	756,745	40,924,642	94,280,666	12,106,943	106,387,609
1992	50,106,997	733,390	39,753,612	90,593,999	12,044,846	102,638,845
1993	48,836,686	715,139	38,135,605	87,687,430	10,407,227	98,094,657
1994	48,489,741	746,328	37,041,696	86,277,765	10,234,627	96,512,392
1995	51,751,765	891,465	37,889,252	90,532,482	10,390,954	100,923,436
1996	53,820,596	724,199	38,926,602	93,471,397	10,591,047	104,062,444
1997	51,648,741	734,372	38,496,224	90,879,337	10,791,905	101,671,242
1998	45,628,841	688,676	36,158,851	82,476,368	10,505,387	92,981,755
1999	40,399,985	624,715	33,178,151	74,202,851	9,153,071	83,355,922
2000	36,824,145	649,285	31,294,459	68,767,889	8,673,170	77,441,059
2001	34,615,545	570,325	26,094,494	61,280,364	7,512,221	68,792,585
2002	29,190,267	542,793	22,142,043	51,875,103	6,623,490	58,498,593
2003	27,612,898	485,376	20,837,286	48,935,560	6,602,093	55,537,653
2004	29,994,638	423,714	21,763,920	52,182,272	7,298,949	59,481,221
2005	31,747,957	471,395	23,327,566	55,546,918	7,861,474	63,408,392
2006	35,264,614	410,803	23,910,753	59,586,170	8,358,091	67,944,261
2007	39,808,092	447,712	26,192,750	66,448,554	9,043,003	75,491,557

¹Beginning in 1983, only operator data are available at this level of detail.

Year