Mining
    Productivity: Output per hour of all persons, by industry /1


                                     Oil      Nonmetalic
                  Metal    Coal     & Gas      minerals
                  Mining  Mining  Extraction   ex fuels
          Mining  SIC 10  SIC 12    SIC 13      SIC 14
          ------  ------  ------  ----------  ----------
    1977   47.33   11.36   14.35       83.40       24.33
    1978   45.60   12.23   14.59       74.68       26.18
    1979   36.70   11.34   13.68       56.59       24.00
    1980   37.72   11.45   16.51       52.98       23.73
    1981   33.86   14.25   18.13       42.50       22.59
    1982   34.15   16.61   18.66       41.71       22.38
    1983   37.56   18.30   20.80       46.44       23.66
    1984   39.93   21.92   22.77       48.48       30.24
    1985   43.59   25.66   22.36       53.94       29.45
    1986   50.66   35.17   27.02       64.88       35.02
    1987   55.62   29.18   28.87       76.53       32.81
    1988   67.97   31.10   34.42       96.80       32.66
    1989   61.93   28.44   36.42       85.96       32.06
    1990   61.43   31.30   37.23       82.64       31.21
    1991   64.09   46.08   41.02       81.53       35.11
    1992   66.00   50.23   49.66       82.55       35.92
    1993   69.33   53.49   57.51       86.07       35.61
    1994   73.47   45.94   65.51       91.93       36.39

    /1 Output is chained 1992 dollar gross product originating by industry
    published by the Bureau of Economic Analysis (BEA) in Table 14 (page 154) of
    the August 1996.  Hours of all persons are constructed by assuming that
    self-employed workers work the same number of hours annually as full-time
    employees.  Annual hours of full-time employees are constructed by dividing
    hours worked by full-time and part-time employees by the number of
    full-time-equivalent employees.  Self-employed workers are constructed by
    subtracting full-time-equivalent employees from persons engaged in
    production.  See Tables 6.5c, 6.8c, 6.9c in the National Income and Product
    Accounts.  Data for 1987 to 1994 are reported using 1987 SIC definitions;
    data for 1977 to 1986 are reported using 1972 SIC definitions.  Productivity
    levels in the earlier period are adjusted by setting the 1987 levels of
    productivity equal for the two definitions.  Where the two sets of SIC codes
    were not comparable, we followed BEAs instructions and merged series.  These
    are indicated by footnotes.  Finally, there are some series breaks for the
    number of self-employed workers in the two-digit industries between 1991 and
    1992.