Table 02. Average
Number of EMPLOYEES 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
|
6,082
|
1,232
|
7,314
|
11,346
|
28
|
290
|
11,664
|
1979
|
6,144
|
1,531
|
7,675
|
11,587
|
13
|
245
|
11,845
|
1980
|
6,612
|
2,322
|
8,934
|
12,068
|
13
|
386
|
12,467
|
1981
|
6,546
|
2,741
|
9,287
|
12,138
|
15
|
21
|
12,174
|
1982
|
5,736
|
2,231
|
7,967
|
9,497
|
11
|
18
|
9,526
|
1983 1/
|
4,220
|
814
|
5,034
|
7,521
|
78
|
17
|
7,616
|
1984
|
4,303
|
737
|
5,040
|
8,392
|
153
|
17
|
8,562
|
1985
|
3,858
|
721
|
4,579
|
8,942
|
192
|
16
|
9,150
|
1986
|
3,578
|
673
|
4,251
|
7,495
|
185
|
11
|
7,691
|
1987
|
3,323
|
631
|
3,954
|
6,869
|
185
|
-
|
7,054
|
1988
|
3,475
|
648
|
4,123
|
6,919
|
140
|
-
|
7,059
|
1989
|
3,703
|
714
|
4,417
|
7,016
|
176
|
-
|
7,192
|
1990
|
3,797
|
716
|
4.513
|
7,106
|
42
|
-
|
7,148
|
1991
|
3,644
|
637
|
4,281
|
6,590
|
80
|
-
|
6,670
|
1992
|
3,594
|
644
|
4,238
|
6,125
|
71
|
-
|
6,196
|
1993
|
3,317
|
614
|
3,931
|
5,967
|
20
|
-
|
5,987
|
1994
|
3,236
|
634
|
3,870
|
6,778
|
14
|
-
|
6,792
|
1995
|
3,345
|
559
|
3,904
|
5,821
|
11
|
-
|
5,832
|
1996
|
3,166
|
575
|
3,741
|
5,936
|
12
|
-
|
5,948
|
1997
|
3,082
|
422
|
3,504
|
5,808
|
13
|
-
|
5,821
|
1998
|
2,908
|
383
|
3,291
|
5,659
|
41
|
-
|
5,700
|
1999
|
2,745
|
416
|
3,161
|
5,602
|
57
|
12
|
5,671
|
2000
|
2,456
|
378
|
2,834
|
5,773
|
13
|
-
|
5,786
|
2001
|
2,429
|
411
|
2,840
|
5,550
|
11
|
-
|
5,561
|
2002
|
2,272
|
310
|
2,582
|
5,117
|
2
|
19
|
5,138
|
2003
|
2,188
|
301
|
2,489
|
5,048
|
43
|
13
|
5,104
|
2004
|
2,289
|
325
|
2,614
|
4,995
|
35
|
12
|
5,042
|
2005
|
2,330
|
376
|
2,706
|
4,994
|
86
|
13
|
5,093
|
2006
|
2,374
|
361
|
2,735
|
4,880
|
48
|
13
|
4,941
|
2007
|
2,411
|
403
|
2,814
|
4,705
|
92
|
14
|
4,811
|
Table
02. Average Number of EMPLOYEES 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
|
18,978
|
89
|
26,404
|
45,471
|
7,536
|
53,007
|
1979
|
19,520
|
134
|
25,808
|
45,462
|
7,777
|
53,239
|
1980
|
21,401
|
13
|
24,720
|
46,134
|
7,446
|
53,580
|
1981
|
21,461
|
10
|
25,157
|
46,628
|
7,427
|
54,055
|
1982
|
17,493
|
15
|
20,439
|
37,947
|
7,194
|
45,141
|
1983 1/
|
12,650
|
10
|
18,067
|
30,727
|
5,882
|
36,609
|
1984
|
13,602
|
33
|
18,906
|
32,541
|
5,537
|
38,078
|
1985
|
13,729
|
26
|
17,964
|
31,719
|
5,283
|
37,002
|
1986
|
11,942
|
28
|
17,357
|
29,327
|
4,778
|
34,105
|
1987
|
11,008
|
18
|
16,820
|
27,846
|
4,580
|
32,426
|
1988
|
11,182
|
17
|
17,178
|
28,377
|
4,543
|
32,920
|
1989
|
11,609
|
5
|
17,238
|
28,852
|
4,678
|
33,530
|
1990
|
11,661
|
-
|
17,376
|
28,037
|
4,781
|
33,818
|
1991
|
10,951
|
-
|
16,521
|
27,472
|
4,740
|
32,212
|
1992
|
10,434
|
-
|
16,065
|
26,499
|
4,544
|
32,212
|
1993
|
9,918
|
-
|
16,194
|
26,112
|
4,345
|
30,457
|
1994
|
10,662
|
-
|
15,326
|
25,988
|
4,405
|
30,393
|
1995
|
9,736
|
-
|
15,399
|
25,135
|
4,306
|
29,441
|
1996
|
9,689
|
-
|
15,193
|
24,882
|
4,204
|
29,086
|
1997
|
9,325
|
-
|
15,070
|
24,395
|
4,233
|
28,628
|
1998
|
8,991
|
-
|
14,634
|
23,625
|
4,016
|
27,641
|
1999
|
8,832
|
-
|
14,081
|
22,913
|
3,931
|
26,844
|
2000
|
8,620
|
-
|
13,495
|
22,115
|
3,803
|
25,918
|
2001
|
8,401
|
-
|
12,945
|
21,346
|
3,683
|
25,029
|
2002
|
7,720
|
-
|
12,225
|
19,945
|
3,471
|
23,416
|
2003
|
7,593
|
-
|
11,814
|
19,407
|
3,363
|
22,770
|
2004
|
7,656
|
-
|
11,776
|
19,432
|
3,412
|
22,844
|
2005
|
7,799
|
-
|
11,879
|
19,678
|
3,361
|
23,039
|
2006
|
7,676
|
-
|
11,938
|
19,614
|
3,437
|
23,051
|
2007
|
7,625
|
-
|
11,694
|
19,319
|
3,545
|
22,864
|
1/
Beginning
in 1983, only operator data are available at this level of detail.
|