Table 03. EMPLOYEE HOURS worked at Nonmetallic 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
|
11,438,025
|
2,179,736
|
13,617,761
|
20,783,131
|
38,710
|
495,864
|
21,317,705
|
|
1979
|
12,306,045
|
2,589,525
|
14,895,570
|
26,960,041
|
8,563
|
435,598
|
21,404,202
|
|
1980
|
12,358,364
|
3,425,920
|
15,784,284
|
21,693,176
|
8,770
|
235,872
|
21,937,818
|
|
1981
|
12,643,607
|
3,937,086
|
16,580,693
|
20,871,842
|
11,924
|
44,316
|
20,928,082
|
|
1982
|
10,608,220
|
4,100,370
|
14,708,590
|
13,558,942
|
23,056
|
39,470
|
13,621,468
|
|
1983 1/
|
8,098,523
|
1,499,524
|
9,598,047
|
13,541,934
|
245,367
|
34,541
|
13,821,842
|
|
1984
|
8,455,444
|
1,468,839
|
9,924,283
|
14,969,337
|
457,948
|
34,271
|
15,461,556
|
|
1985
|
7,637,052
|
1,356,430
|
8,993,482
|
14,267,580
|
433,691
|
34,162
|
14,735,433
|
|
1986
|
6,826,953
|
1,271,831
|
8,098,784
|
12,760,161
|
395,473
|
20,687
|
13,176,321
|
|
1987
|
6,617,507
|
1,251,169
|
7,868,676
|
12,694,901
|
250,355
|
-
|
12,945,256
|
|
1988
|
7,273,046
|
1,299,567
|
8,572,613
|
13,027,611
|
263,395
|
-
|
13,291,006
|
|
1989
|
7,578,462
|
1,394,173
|
8,972,635
|
13,015,545
|
288,386
|
-
|
13,303,931
|
|
1990
|
7,609,520
|
1,426,264
|
9,035,784
|
12,932,823
|
72,321
|
-
|
13,005,144
|
|
1991
|
7,419,300
|
1,217,164
|
8,636,464
|
12,168,823
|
184,038
|
-
|
12,352,861
|
|
1992
|
7,253,717
|
1,262,899
|
8,516,616
|
11,353,982
|
157,344
|
-
|
11,511,326
|
|
1993
|
6,710,232
|
1,202,545
|
7,912,777
|
10,881,579
|
39,857
|
-
|
10,921,436
|
|
1994
|
6,659,681
|
1,349,121
|
8,008,802
|
11,215,499
|
26,590
|
-
|
11,242,089
|
|
1995
|
6,486,790
|
1,142,803
|
7,629,593
|
11,337,739
|
24,473
|
-
|
11,362,212
|
|
1996
|
6,602,819
|
1,196,274
|
7,799,093
|
11,658,440
|
29,247
|
-
|
11,687,687
|
|
1997
|
6,457,444
|
823,770
|
7,281,214
|
11,420,435
|
29,578
|
-
|
11,450,013
|
|
1998
|
5,862,116
|
737,269
|
6,599,385
|
11,384,645
|
93,468
|
-
|
11,478,113
|
|
1999
|
5,437,330
|
836,185
|
6,273,515
|
10,937,456
|
118,365
|
34,912
|
11,090,733
|
|
2000
|
5,052,716
|
794,600
|
5,847,316
|
11,065,553
|
31,814
|
-
|
11,097,367
|
|
2001
|
5,183,266
|
795,107
|
5,978,373
|
10,305,812
|
33,761
|
-
|
10,339,573
|
|
2002
|
4,551,443
|
595,754
|
5,147,197
|
9,803,565
|
3,628
|
36,644
|
9,843,837
|
|
2003
|
4,607,584
|
657,552
|
5,265,136
|
9,697,640
|
89,813
|
30,918
|
9,818,371
|
|
2004
|
4,882,067
|
703,067
|
5,585,134
|
9,767,613
|
61,190
|
29,021
|
9,857,824
|
|
2005
|
4,779,692
|
746,577
|
5,526,269
|
9,456,852
|
169,819
|
31,804
|
9,658,475
|
|
2006
|
4,830,187
|
732,330
|
5,562,517
|
9,467,508
|
99,367
|
33,410
|
9,600,285
|
|
2007
|
4,955,690
|
784,587
|
5,740,277
|
9,212,741
|
205,526
|
33,469
|
9,451,736
|
Table 03. EMPLOYEE
HOURS worked at Nonmetallic 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
|
34,935,466
|
169,429
|
51,763,083
|
86,867,978
|
13,982,793
|
100,850,771
|
|
1979
|
36,299,772
|
221,416
|
49,296,791
|
85,817,979
|
14,079,964
|
99,897,943
|
|
1980
|
37,722,102
|
20,934
|
46,325,866
|
84,068,902
|
13,237,153
|
97,306,055
|
|
1981
|
37,508,775
|
20,457
|
48,315,466
|
85,844,698
|
13,434,373
|
99,279,071
|
|
1982
|
28,330,058
|
26,347
|
32,595,385
|
60,951,790
|
11,236,241
|
72,188,031
|
|
1983 1/
|
23,419,889
|
22,630
|
35,796,479
|
59,238,998
|
10,835,475
|
70,074,473
|
|
1984
|
25,385,839
|
76,594
|
37,910,675
|
63,373,108
|
10,219,766
|
73,592,874
|
|
1985
|
23,728,915
|
57,331
|
36,478,821
|
60,265,067
|
9,774,470
|
70,039,537
|
|
1986
|
21,275,105
|
54,027
|
33,962,953
|
55,292,085
|
8,842,744
|
64,134,829
|
|
1987
|
20,813,932
|
41,516
|
34,262,951
|
55,118,399
|
8,626,196
|
63,744,595
|
|
1988
|
21,863,619
|
35,439
|
35,652,835
|
57,551,893
|
8,692,185
|
66,244,078
|
|
1989
|
22,276,566
|
9,083
|
35,732,634
|
58,018,283
|
8,773,429
|
66,791,712
|
|
1990
|
22,040,928
|
-
|
35,207,673
|
57,248,601
|
8,793,214
|
66,041,815
|
|
1991
|
20,989,325
|
-
|
34,220,388
|
55,209,713
|
8,528,409
|
63,738,122
|
|
1992
|
20,027,942
|
-
|
33,274,280
|
53,302,222
|
8,178,059
|
61,480,281
|
|
1993
|
18,834,213
|
-
|
31,597,388
|
50,431,601
|
7,829,213
|
58,260,814
|
|
1994
|
19,250,891
|
-
|
31,912,938
|
51,163,829
|
8,433,903
|
59,597,732
|
|
1995
|
18,991,805
|
-
|
32,110,896
|
51,102,701
|
8,171,338
|
59,274,039
|
|
1996
|
19,486,780
|
-
|
32,240,194
|
51,726,974
|
8,276,264
|
60,003,238
|
|
1997
|
18,731,227
|
-
|
32,224,515
|
50,955,742
|
8,228,283
|
59,184,025
|
|
1998
|
18,077,498
|
-
|
31,420,711
|
49,498,209
|
7,685,556
|
57,183,765
|
|
1999
|
17,364,248
|
-
|
29,854,780
|
47,219,028
|
7,438,658
|
54,657,686
|
|
2000
|
16,944,683
|
-
|
28,960,221
|
45,904,904
|
7,188,867
|
53,093,771
|
|
2001
|
16,317,946
|
-
|
27,301,597
|
43,619,543
|
6,940,732
|
50,560,275
|
|
2002
|
14,991,034
|
-
|
26,066,072
|
41,057,106
|
6,481,979
|
47,539,085
|
|
2003
|
15,083,507
|
-
|
25,543,639
|
40,627,146
|
6,241,688
|
46,868,834
|
|
2004
|
15,442,958
|
-
|
24,922,719
|
40,365,677
|
6,488,265
|
46,853,942
|
|
2005
|
15,184,744
|
-
|
24,843,443
|
40,028,187
|
6,188,882
|
46,217,069
|
|
2006
|
15,162,802
|
-
|
24,911,555
|
40,074,357
|
6,367,770
|
46,442,127
|
|
2007
|
15,192,013
|
-
|
24,690,048
|
39,882,061
|
6,648,748
|
46,530,809
|
1/
Beginning in 1983, only operator data are available at this level of detail.
|
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