Hi jr1!
Much of the answer to your question depends on how you define
"domestic workforce". I was able to find some interesting statistics
at the U.S. Department of Labor. They have a table there:
Civilian labor force for selected demographic groups, annual averages,
1948-2000
URL: http://www.bls.gov/opub/rtaw/pdf/table04.pdf
that gives the following figures for the *civilian* workforce (i.e.,
non-military). I was able to thereby calculate the year-by-year growth
figures in the rightmost column below.
Year   workers (in thousands)    % change
1980      106,940                 
1981      108,670                 + 1.6%
1982      110,204                 + 1.4%
1983      111,550                 + 1.2%
1984      113,544                 + 1.8%
1985      115,461                 + 1.7%
1986      117,834                 + 2.1%
1987      119,865                 + 1.7%
1988      121,669                 + 1.5%
1989      123,869                 + 1.8%
1990      125,840                 + 1.6%
1991      126,346                 + 0.4%
1992      128,105                 + 1.4%
1993      129,200                 + 0.9%
1994      131,056                 + 1.4%
1995      132,304                 + 1.0%
1996      133,943                 + 1.2%
1997      136,297                 + 1.8%
1998      137,673                 + 1.0%
1999      139,368                 + 1.2%
2000      140,863                 + 1.1%
Unfortunately, they do not yet have data for 2001. 
For other measures of the U.S. workforce, see:
Statistical tables: Employment and the labor force
URL: http://www.bls.gov/opub/rtaw/stattab2.htm
I hope that this information has been of help to you.  
    
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Thank you.          
         
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