Man hours worked at US coal mines, 1931-1977

Includes hours worked below and above the surface as well as total hours worked.

Source

• U.S. Department of Labor Mine Safety and Health Administration

Summary

Time Series Data

• Range	1931 to 1977 (46 years)
  Scale	Yearly

• Rows	47
  Columns	4

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coal mine mining surface total underground year

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• Latest Complete Data

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• Initial (1.6 kb) Dec 11, 2006

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Data Summary

Showing last 6 rows

Year	Underground	Surface	Total
1972	170,495,460	17,056,901	187,552,361
1973	171,782,448	16,849,790	188,632,238
1974	173,409,396	17,973,527	191,382,923
1975	210,474,994	23,498,699	233,973,693
1976	217,941,158	23,933,537	241,874,695
1977	206,289,834	24,245,599	230,535,433
more...	more...	more...	more...

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Count of Year and Total

Count of Year and Surface

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Count of Year by Total

Column Summaries

Show columns: 1 - 4

Year see all graphs Range 1931 to 1977 (46 years) Scale Yearly

Underground see all graphs Max 831,601,025 Avg 420,431,000 Min 148,593,131 Sum 19,760,300,000 Std Dev 251654000.00

Surface see all graphs Max 180,371,287 Avg 80,702,100 Min 16,849,790 Sum 3,793,000,000 Std Dev 49479000.00

Total see all graphs Max 1,007,071,896 Avg 501,133,000 Min 169,645,414 Sum 23,553,300,000 Std Dev 298841000.00

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