Table 02. Average Number of EMPLOYEES at
Metal/Nonmetal1 Operations
in the United States, by Primary Activity, 1978-2006
Year
|
Underground
Mines
|
Surface
Mines
|
|
Underground
|
Surf
at UG
|
Total
|
Strip
|
Dredge
|
Other
|
Total
|
1978
|
27,661
|
6,201
|
33,862
|
106,113
|
6,941
|
367
|
113,421
|
1979
|
29,000
|
7,092
|
36,092
|
115,331
|
6,737
|
310
|
122,378
|
1980
|
29,821
|
8,972
|
38,793
|
110,814
|
6,108
|
476
|
117,398
|
1981
|
29,860
|
10,055
|
39,915
|
105,715
|
5,470
|
37
|
111,222
|
1982
|
21,911
|
7,508
|
29,419
|
80,501
|
4,786
|
25
|
85,312
|
1983
|
15,715
|
6,422
|
22,137
|
80,798
|
4,802
|
465
|
86,065
|
1984
|
15,848
|
4,140
|
19,988
|
85,997
|
5,141
|
72
|
91,210
|
1985
|
14,224
|
3,953
|
18,177
|
88,660
|
5,409
|
16
|
94,085
|
1986
|
12,854
|
3,552
|
16,406
|
87,476
|
5,352
|
11
|
92,839
|
1987
|
12,381
|
3,838
|
16,219
|
89,288
|
5,741
|
1
|
95,030
|
1988
|
13,334
|
4,269
|
17,603
|
92,672
|
5,606
|
-
|
98,278
|
1989
|
13,905
|
5,530
|
19,435
|
96,410
|
5,813
|
-
|
102,223
|
1990
|
13,765
|
4,891
|
18,656
|
98,097
|
5,647
|
-
|
103,744
|
1991
|
12,584
|
4,660
|
17,244
|
94,592
|
5,752
|
-
|
100,344
|
1992
|
11,945
|
4,361
|
16,306
|
94,117
|
5,367
|
-
|
99,484
|
1993
|
11,236
|
4,015
|
15,251
|
93,341
|
5,363
|
82
|
98,786
|
1994
|
11,537
|
4,381
|
15,918
|
98,529
|
5,470
|
753
|
104,752
|
1995
|
12,097
|
4,981
|
17,078
|
99,393
|
5,401
|
931
|
105,725
|
1996
|
12,079
|
4,241
|
16,320
|
99,206
|
5,288
|
774
|
105,268
|
1997
|
12,368
|
4,296
|
16,664
|
104,264
|
5,496
|
724
|
110,484
|
1998
|
12,022
|
3,744
|
15,766
|
104,913
|
5,175
|
433
|
110,521
|
1999
|
11,316
|
3,706
|
15,022
|
108,019
|
5,353
|
850
|
114,222
|
2000
|
10,781
|
4,200
|
14,981
|
109,241
|
5,335
|
585
|
115,161
|
2001
|
10,800
|
3,692
|
14,492
|
107,848
|
5,323
|
361
|
113,532
|
2002
|
9,410
|
2,921
|
12,331
|
104,676
|
5,150
|
158
|
109,984
|
2003
|
8,717
|
2,832
|
11,549
|
103,295
|
5,430
|
131
|
108,856
|
2004
|
9,173
|
3,309
|
12,482
|
106,968
|
5,578
|
193
|
112,739
|
2005
|
9,792
|
3,538
|
13,330
|
111,526
|
5,691
|
242
|
117,459
|
2006
|
10,605
|
4,109
|
14,714
|
118,558
|
5,774
|
291
|
124,623
|
Table
02. Average Number of EMPLOYEES at Metal/Nonmetal1 Operations
in
the United States,
by Primary Activity, 1978-2006 –
continued:
Year
|
Total
Mining
|
Indp
Shops/Yrds
|
Mills
|
Total
w/o Office
|
Office
|
Grand
Total
|
1978
|
147,283
|
2,918
|
101,420
|
251,621
|
36,956
|
288,577
|
1979
|
158,470
|
2,957
|
107,679
|
269,106
|
38,979
|
308,085
|
1980
|
156,191
|
1,444
|
105,422
|
263,057
|
38,578
|
301,635
|
1981
|
151,137
|
1,396
|
106,346
|
258,879
|
37,969
|
296,848
|
1982
|
114,731
|
874
|
81,553
|
197,158
|
32,867
|
230,025
|
1983
|
108,202
|
1,291
|
75,436
|
184,929
|
29,732
|
214,661
|
1984
|
111,198
|
1,550
|
77,992
|
190,740
|
28,987
|
219,727
|
1985
|
112,262
|
1,108
|
76,087
|
189,457
|
28,655
|
218,112
|
1986
|
109,245
|
737
|
72,178
|
182,160
|
27,478
|
209,638
|
1987
|
111,249
|
738
|
73,185
|
185,172
|
28,360
|
213,532
|
1988
|
115,881
|
674
|
80,105
|
196,660
|
28,762
|
225,422
|
1989
|
121,658
|
601
|
82,041
|
204,300
|
30,249
|
234,549
|
1990
|
122,400
|
598
|
82,007
|
205,005
|
30,685
|
235,690
|
1991
|
117,588
|
565
|
81,112
|
199,275
|
30,832
|
230,107
|
1992
|
115,790
|
537
|
77,129
|
193,456
|
31,111
|
224,567
|
1993
|
114,037
|
528
|
74,854
|
189,419
|
29,901
|
219,320
|
1994
|
120,670
|
654
|
74,764
|
196,088
|
29,410
|
225,498
|
1995
|
122,803
|
719
|
77,008
|
200,530
|
29,006
|
229,536
|
1996
|
121,588
|
678
|
77,936
|
200,202
|
28,843
|
229,045
|
1997
|
127,148
|
647
|
78,698
|
206,493
|
29,422
|
235,915
|
1998
|
126,287
|
616
|
78,961
|
205,864
|
29,368
|
235,232
|
1999
|
129,244
|
564
|
79,282
|
209,090
|
29,762
|
238,852
|
2000
|
130,142
|
563
|
80,271
|
179,047
|
30,018
|
240,450
|
2001
|
128,024
|
553
|
75,583
|
204,160
|
28,610
|
232,770
|
2002
|
122,315
|
567
|
67,778
|
190,660
|
27,488
|
218,148
|
2003
|
120,405
|
530
|
67,224
|
188,159
|
27,166
|
215,325
|
2004
|
125,221
|
571
|
66,773
|
192,565
|
27,709
|
220,274
|
2005
|
130,789
|
622
|
68,796
|
200,207
|
28,194
|
228,401
|
2006
|
139,337
|
541
|
71,454
|
211,332
|
29,190
|
240,522
|
All
numbers include contractors.
1Includes stone, sand and gravel operations.
|