Table 03. Average Number of
Employees at Coal Mines in the United
States, by Primary Activity, 1978-2007
|
Year
|
Underground
Mines
|
Surface
Mines
|
|
|
Underground
|
Surf
at UG
|
Total
|
Strip
|
Auger
|
Culm
Bank
|
Dredge
|
Total
|
|
1978
|
128,076
|
15,917
|
143,993
|
74,227
|
1,059
|
361
|
21
|
75,668
|
|
1979
|
132,928
|
15,997
|
148,925
|
73,244
|
636
|
362
|
44
|
74,286
|
|
1980
|
127,169
|
15,480
|
142,649
|
70,776
|
584
|
360
|
70
|
71,790
|
|
1981
|
121,702
|
15,603
|
137,305
|
72,062
|
793
|
342
|
120
|
73,317
|
|
1982
|
118,760
|
14,115
|
132,875
|
69,972
|
597
|
409
|
111
|
71,089
|
|
1983
|
89,803
|
11,681
|
101,484
|
63,306
|
592
|
363
|
114
|
64,375
|
|
1984
|
93,554
|
11,823
|
105,377
|
67,622
|
563
|
368
|
120
|
68,673
|
|
1985
|
89,073
|
11,959
|
101,012
|
62,516
|
628
|
382
|
126
|
63,652
|
|
1986
|
82,643
|
11,513
|
94,156
|
59,404
|
611
|
479
|
109
|
60,603
|
|
1987
|
75,297
|
10,502
|
85,799
|
56,886
|
884
|
516
|
169
|
58,455
|
|
1988
|
71,775
|
10,194
|
81,969
|
54,753
|
910
|
486
|
186
|
56,335
|
|
1989
|
69,589
|
10,612
|
80,201
|
53,518
|
900
|
532
|
187
|
55,137
|
|
1990
|
70,955
|
11,486
|
82,441
|
54,940
|
874
|
607
|
147
|
56,568
|
|
1991
|
64,591
|
11,784
|
76,375
|
5l,752
|
872
|
648
|
118
|
53,390
|
|
1992
|
60,378
|
11,616
|
71,994
|
50,487
|
957
|
671
|
109
|
52,224
|
|
1993
|
52,427
|
11,699
|
64,126
|
48,365
|
767
|
1,196
|
83
|
50,411
|
|
1994
|
53,936
|
11,423
|
65,359
|
48,771
|
884
|
797
|
112
|
50,564
|
|
1995
|
49,437
|
10,385
|
59,822
|
44,918
|
867
|
759
|
93
|
46,637
|
|
1996
|
46,819
|
10,086
|
56,905
|
43,550
|
1,027
|
809
|
245
|
45,631
|
|
1997
|
45,755
|
10,114
|
55,869
|
44,152
|
1,179
|
896
|
147
|
46,374
|
|
1998
|
44,240
|
9,044
|
53,284
|
43,457
|
1,102
|
753
|
293
|
45,605
|
|
1999
|
40,248
|
8,813
|
49,061
|
41,532
|
1,192
|
621
|
147
|
43,492
|
|
2000
|
37,663
|
8,470
|
46,133
|
39,537
|
948
|
673
|
196
|
41,354
|
|
2001
|
39,667
|
8,727
|
48,394
|
42,271
|
1,175
|
772
|
161
|
44,379
|
|
2002
|
38,075
|
8,540
|
46,615
|
41,315
|
1,077
|
694
|
116
|
43,202
|
|
2003
|
35,408
|
8,221
|
43,629
|
39,326
|
782
|
610
|
146
|
40,864
|
|
2004
|
37,187
|
8,095
|
45,282
|
41,206
|
867
|
765
|
113
|
42,951
|
|
2005
|
40,940
|
8,455
|
49,395
|
43,214
|
982
|
906
|
168
|
45,270
|
|
2006
|
43,015
|
9,182
|
52,197
|
45,583
|
993
|
936
|
112
|
47,624
|
|
2007
|
42,989
|
9,398
|
52,387
|
45,112
|
908
|
1,009
|
197
|
47,226
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Table 03. Average Number of
Employees at Coal Mines in the United
States, by Primary Activity, 1978-2007continued:
|
Year
|
Total
Mining
|
Indp Shops/Yrds
|
Prep
Plants
|
Total
w/o Office
|
Office
|
Grand
Total
|
|
1978
|
219,661
|
3,910
|
22,088
|
245,659
|
9,929
|
255,588
|
|
1979
|
223,211
|
4,011
|
23,004
|
250,226
|
10,203
|
260,429
|
|
1980
|
214,439
|
3,805
|
23,904
|
242,148
|
10,859
|
253,007
|
|
1981
|
210,622
|
3,494
|
24,441
|
238,557
|
11,181
|
249,738
|
|
1982
|
203,964
|
3,232
|
22,831
|
230,027
|
11,427
|
241,454
|
|
1983
|
165,859
|
3,205
|
19,921
|
188,985
|
11,214
|
200,199
|
|
1984
|
174,050
|
3,073
|
20,474
|
197,597
|
10,563
|
208,160
|
|
1985
|
164,684
|
2,045
|
20,124
|
186,853
|
10,196
|
197,049
|
|
1986
|
154,759
|
1,761
|
19,080
|
175,600
|
9,567
|
185,167
|
|
1987
|
144,254
|
1,544
|
18,007
|
163,805
|
8,975
|
172,780
|
|
1988
|
138,304
|
1,155
|
17,720
|
157,179
|
9,099
|
166,278
|
|
1989
|
135,338
|
1,066
|
18,925
|
155,329
|
9,600
|
164,929
|
|
1990
|
139,009
|
1,118
|
19,650
|
159,777
|
8,848
|
168,625
|
|
1991
|
129,765
|
1,114
|
19,228
|
150,107
|
8,570
|
158,677
|
|
1992
|
124,218
|
1,072
|
18,841
|
144,131
|
8,997
|
153,128
|
|
1993
|
114,537
|
933
|
17,065
|
132,535
|
8,648
|
141,183
|
|
1994
|
115,923
|
981
|
18,614
|
135,518
|
8,127
|
143,645
|
|
1995
|
106,459
|
1,023
|
16,583
|
124,065
|
8,046
|
132,111
|
|
1996
|
102,536
|
841
|
15,962
|
119,339
|
7,112
|
126,451
|
|
1997
|
102,243
|
524
|
16,276
|
119,043
|
7,386
|
126,429
|
|
1998
|
98,889
|
622
|
15,799
|
115,310
|
6,773
|
122,083
|
|
1999
|
92,553
|
649
|
15,042
|
108,244
|
6,245
|
114,489
|
|
2000
|
87,487
|
575
|
14,229
|
102,291
|
5,807
|
108,098
|
|
2001
|
92,773
|
589
|
15,034
|
108,396
|
6,062
|
114,458
|
|
2002
|
89,817
|
612
|
14,937
|
105,366
|
5,600
|
110,966
|
|
2003
|
84,493
|
627
|
14,238
|
99,358
|
5,466
|
104,824
|
|
2004
|
88,233
|
780
|
14,239
|
103,252
|
5,482
|
108,734
|
|
2005
|
94,665
|
858
|
15,397
|
110,920
|
5,516
|
116,436
|
|
2006
|
99,821
|
1,045
|
16,584
|
117,450
|
5,525
|
122,975
|
|
2007
|
99,613
|
892
|
16,577
|
117,082
|
5,854
|
122,936
|
All numbers include contractors.
|
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