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


                 Wholesale  Retail
          Trade    trade    trade
          -----  ---------  ------
    1977  15.81      21.10   13.88
    1978  16.25      21.48   14.31
    1979  16.11      21.64   14.00
    1980  15.91      21.37   13.77
    1981  16.65      22.29   14.36
    1982  16.86      23.25   14.34
    1983  17.61      23.78   15.24
    1984  18.63      25.93   15.86
    1985  19.20      26.19   16.54
    1986  20.97      29.48   17.72
    1987  19.39      27.83   16.26
    1988  20.01      28.31   16.85
    1989  20.15      29.24   16.71
    1990  20.35      29.69   16.85
    1991  20.87      31.96   16.73
    1992  21.52      33.54   16.97
    1993  21.95      35.70   17.06
    1994  22.35      36.67   17.26

    /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.