Table 03. EMPLOYEE HOURS worked at Stone Operations
in the United States,
by Primary Activity, 1978-2007
|
Underground Mines
Surface Mines
|
Year
|
Underground
|
Surf
at UG
|
Total
|
Strip
|
Dredge
|
Other
|
Total
|
1978
|
3,736,533
|
910,730
|
4,647,263
|
65,622,643
|
851,478
|
-
|
66,474,121
|
1979
|
3,871,446
|
963,214
|
4,834,660
|
69,494,907
|
997,678
|
-
|
70,492,585
|
1980
|
3,553,234
|
836,941
|
4,390,175
|
65,778,342
|
873,708
|
-
|
66,652,050
|
1981
|
3,149,931
|
822,918
|
3,972,849
|
56,692,442
|
812,182
|
-
|
57,504,624
|
1982
|
2,730,503
|
811,226
|
3,541,729
|
26,468,945
|
269,333
|
-
|
26,738,278
|
1983 1/
|
2,578,560
|
728,117
|
3,306,677
|
52,143,546
|
320,188
|
-
|
52,463,734
|
1984
|
2,862,197
|
774,821
|
3,637,018
|
56,537,983
|
416,187
|
-
|
56,954,170
|
1985
|
2,799,062
|
821,363
|
3,620,425
|
58,747,865
|
580,276
|
-
|
59,328,141
|
1986
|
2,916,982
|
726,095
|
3,643,077
|
61,245,897
|
527,495
|
-
|
61,773,392
|
1987
|
2,885,904
|
743,435
|
3,629,339
|
61,462,075
|
511,203
|
-
|
61,973,278
|
1988
|
3,007,123
|
824,878
|
3,832,001
|
60,942,035
|
384,136
|
-
|
61,326,171
|
1989
|
3,029,414
|
830,957
|
3,860,371
|
57,909,215
|
372,017
|
-
|
58,281,232
|
1990
|
3,123,546
|
909,863
|
4,033,409
|
56,628,199
|
358,714
|
-
|
56,986,913
|
1991
|
2,929,923
|
870,739
|
3,800,662
|
51,754,519
|
211,493
|
-
|
51,966,002
|
1992
|
3,024,659
|
904,791
|
3,929,450
|
52,625,149
|
148,559
|
-
|
52,773,708
|
1993
|
3,092,881
|
882,066
|
3,974,947
|
54,557,746
|
174,051
|
-
|
54,731,797
|
1994
|
3,391,409
|
717,977
|
4,109,386
|
57,567,156
|
195,881
|
-
|
57,763,037
|
1995
|
3,423,888
|
624,586
|
4,048,474
|
57,718,063
|
162,031
|
-
|
57,880,094
|
1996
|
3,438,121
|
603,153
|
4,041,274
|
56,448,940
|
209,394
|
-
|
56,658,334
|
1997
|
3,619,880
|
612,289
|
4,232,169
|
57,721,111
|
157,415
|
-
|
57,878,526
|
1998
|
3,852,906
|
634,385
|
4,487,291
|
60,585,553
|
77,462
|
-
|
60,663,015
|
1999
|
3,905,514
|
704,183
|
4,609,697
|
62,779,296
|
57,034
|
-
|
62,836,330
|
2000
|
3,957,707
|
786,822
|
4,744,529
|
63,018,404
|
65,367
|
1,844
|
63,085,615
|
2001
|
3,850,874
|
829,542
|
4,680,416
|
62,715,700
|
78,232
|
-
|
62,793,932
|
2002
|
3,750,888
|
901,869
|
4,652,757
|
62,550,638
|
82,790
|
-
|
62,633,428
|
2003
|
3,699,273
|
791,960
|
4,491,233
|
63,099,914
|
125,332
|
-
|
63,225,246
|
2004
|
3,900,525
|
793,463
|
4,693,988
|
65,832,847
|
76,092
|
-
|
65,908,939
|
2005
|
4,280,859
|
815,144
|
5,096,003
|
69,430,991
|
56,611
|
|
69,487,602
|
2006
|
4,308,724
|
947,646
|
5,256,370
|
71,156,840
|
61,155
|
-
|
71,217,995
|
2007
|
4,126,528
|
947,080
|
5,073,608
|
68,860,812
|
67,146
|
-
|
68,927,958
|
|
|
|
|
|
|
|
|
|
1/ Beginning in 1983, only operator data are
available at this level of detail.
Table 03. EMPLOYEE HOURS worked at Stone 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
|
71,121,384
|
724,116
|
92,198,607
|
164,044,107
|
22,506,017
|
186,550,124
|
1979
|
75,327,245
|
631,402
|
97,107,907
|
173,066,554
|
23,954,264
|
197,020,818
|
1980
|
71,042,225
|
496,383
|
92,081,904
|
163,620,512
|
23,976,355
|
187,596,867
|
1981
|
61,477,473
|
382,944
|
82,996,842
|
144,857,259
|
22,041,805
|
166,899,064
|
1982
|
30,280,007
|
169,091
|
36,276,597
|
66,725,695
|
10,716,137
|
77,441,832
|
1983 1/
|
55,770,411
|
283,019
|
70,168,956
|
126,222,386
|
20,068,277
|
146,290,663
|
1984
|
60,591,188
|
328,051
|
74,338,544
|
135,257,783
|
20,797,196
|
156,054,979
|
1985
|
62,948,566
|
360,940
|
73,941,891
|
137,251,397
|
20,810,480
|
158,061,877
|
1986
|
65,416,469
|
336,587
|
72,853,842
|
138,606,898
|
21,264,651
|
159,971,549
|
1987
|
65,602,617
|
399,520
|
73,677,650
|
139,679,787
|
21,008,293
|
160,688,080
|
1988
|
65,158,172
|
449,463
|
74,862,975
|
140,470,610
|
20,735,582
|
161,206,192
|
1989
|
62,141,603
|
483,244
|
74,528,335
|
137,153,182
|
21,074,826
|
158,228,008
|
1990
|
61,020,322
|
433,377
|
73,794,663
|
135,248,362
|
21,000,041
|
156,248,403
|
1991
|
55,766,664
|
367,723
|
69,723,952
|
125,858,339
|
20,238,578
|
146,096,917
|
1992
|
56,703,158
|
373,441
|
68,561,308
|
125,637,907
|
20,308,961
|
145,946,868
|
1993
|
58,706,744
|
347,048
|
69,693,489
|
128,747,281
|
20,377,510
|
149,124,791
|
1994
|
61,872,423
|
552,503
|
70,087,122
|
132,512,048
|
20,278,723
|
152,790,771
|
1995
|
61,938,568
|
607,209
|
72,628,231
|
135,164,008
|
20,080,041
|
155,244,049
|
1996
|
60,699,608
|
692,727
|
75,053,451
|
136,445,786
|
20,251,409
|
156,697,195
|
1997
|
62,110,695
|
625,072
|
76,426,346
|
139,162,113
|
20,567,253
|
159,729,366
|
1998
|
65,150,306
|
631,131
|
77,671,119
|
143,452,556
|
21,315,997
|
164,768,553
|
1999
|
67,446,027
|
542,248
|
77,966,379
|
145,954,654
|
21,817,699
|
167,772,353
|
2000
|
67,830,144
|
479,723
|
77,861,674
|
146,171,541
|
22,369,717
|
168,541,258
|
2001
|
67,474,348
|
484,445
|
76,180,454
|
144,139,247
|
21,912,459
|
166,051,706
|
2002
|
67,286,185
|
480,454
|
71,962,500
|
139,729,139
|
21,997,433
|
161,726,572
|
2003
|
67,716,479
|
494,256
|
70,267,551
|
138,478,286
|
21,530,831
|
160,009,117
|
2004
|
70,602,927
|
627,702
|
71,074,984
|
142,305,613
|
21,155,914
|
163,461,527
|
2005
|
74,583,605
|
624,943
|
72,091,724
|
147,300,272
|
21,319,109
|
168,619,381
|
2006
|
76,474,365
|
558,100
|
72,070,847
|
149,103,312
|
21,700,178
|
170,803,490
|
2007
|
74,001,566
|
520,802
|
69,889,975
|
144,412,343
|
22,096,430
|
166,508,773
|
1/ Beginning in 1983,
only operator data are available at this level of detail.
|