TABLE II.F6.--COMPARISON OF INCOME RATES AND COST RATES,
             BY TRUST FUND, SELECTED CALENDAR YEARS 1950-94, AND
           ESTIMATED RATES BY ALTERNATIVE, CALENDAR YEARS 1995-2004
                   [As a percentage of taxable payroll] 
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              OASI Trust Fund         DI Trust Fund       OASI and DI, combined
           --------------------   --------------------    ---------------------
Calendar   Income   Cost   Bal-   Income   Cost   Bal-    Income    Cost   Bal-
  year       rate   rate   ance     rate   rate   ance      rate    rate   ance
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Historical data:
  1950..     3.00   1.17   1.83       --     --     --      3.00    1.17   1.83 
  1955..     4.00   3.34    .66       --     --     --      4.00    3.34    .66
  1960..     5.50   5.59   -.09     0.50   0.30   0.20      6.00    5.89    .11 
  1965..     6.75   7.23   -.48      .50    .70   -.20      7.25    7.93   -.68 
  1970..     7.30   7.32   -.02     1.10    .81    .29      8.40    8.12    .28 
  1975..     8.75   9.29   -.54     1.15   1.36   -.21      9.90   10.65   -.75 
  1980..     9.04   9.36   -.32     1.12   1.38   -.26     10.16   10.74   -.58 
  1985.. 1/ 10.71   9.94    .78  1/ 1.07   1.13   -.06  1/ 11.79   11.07    .72 
  1990.. 1/ 11.32   9.66   1.66  1/ 1.17   1.09    .09  1/ 12.49   10.75   1.74

  1991 2/   11.44  10.15   1.29     1.21   1.18    .03     12.65   11.33   1.32 
  1992 2/   11.43  10.27   1.16     1.21   1.26   -.06     12.64   11.53   1.11 
  1993 2/   11.40  10.37   1.03     1.21   1.35   -.14     12.61   11.73    .89 
  1994 2/   10.70  10.10    .60     1.89   1.38    .51     12.59   11.48   1.11
Intermediate:
  1995.. 1/ 10.69  10.05    .64  1/ 1.89   1.44    .45  1/ 12.58   11.49   1.09
  1996..    10.73  10.03    .70     1.89   1.49    .40     12.62   11.52   1.10
  1997..    10.91  10.01    .91     1.71   1.54    .17     12.62   11.54   1.08
  1998..    10.92  10.01    .90     1.71   1.58    .13     12.63   11.59   1.03
  1999..    10.92  10.03    .89     1.71   1.64    .08     12.63   11.66    .97

  2000..    10.83  10.05    .78     1.81   1.68    .13     12.64   11.73    .91
  2001..    10.83  10.05    .78     1.82   1.73    .09     12.65   11.78    .87
  2002..    10.83  10.05    .79     1.82   1.77    .05     12.65   11.82    .83
  2003..    10.84  10.05    .79     1.82   1.82    (3)     12.66   11.86    .79
  2004..    10.84  10.04    .81     1.82   1.86   -.05     12.66   11.90    .76
Low Cost:
  1995.. 1/ 10.67   9.94    .73  1/ 1.89   1.41    .48  1/ 12.56   11.35   1.21
  1996..    10.72   9.77    .95     1.89   1.41    .48     12.61   11.18   1.43
  1997..    10.90   9.62   1.28     1.71   1.42    .29     12.61   11.04   1.58
  1998..    10.90   9.49   1.41     1.71   1.42    .29     12.62   10.91   1.70
  1999..    10.91   9.38   1.53     1.71   1.43    .28     12.62   10.81   1.81

  2000..    10.81   9.28   1.53     1.81   1.44    .37     12.62   10.72   1.90
  2001..    10.81   9.20   1.61     1.81   1.45    .36     12.62   10.65   1.98
  2002..    10.81   9.12   1.69     1.81   1.46    .35     12.63   10.59   2.04
  2003..    10.82   9.05   1.77     1.81   1.48    .34     12.63   10.52   2.11
  2004..    10.82   8.97   1.85     1.81   1.50    .32     12.63   10.46   2.17
High Cost:
  1995.. 1/ 10.71  10.12    .60  1/ 1.89   1.48    .41  1/ 12.61   11.60   1.01
  1996..    10.74  10.38    .36     1.89   1.60    .29     12.63   11.97    .65
  1997..    10.92  10.36    .56     1.71   1.68    .04     12.63   12.04    .59
  1998..    10.92  10.43    .50     1.71   1.76   -.05     12.64   12.19    .45
  1999..    10.94  10.91    .03     1.72   1.93   -.21     12.66   12.84   -.18

  2000..    10.85  11.01   -.17     1.82   2.03   -.21     12.67   13.04   -.38
  2001..    10.85  11.04   -.19     1.82   2.11   -.29     12.67   13.15   -.48
  2002..    10.86  11.09   -.23     1.82   2.19   -.37     12.68   13.28   -.60
  2003..    10.87  11.15   -.29     1.82   2.27   -.45     12.69   13.42   -.74
  2004..    10.87  11.22   -.35     1.82   2.35   -.53     12.69   13.57   -.87
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1/ Income rates for 1985, 1990, and 1995 are modified to include adjustments to
the lump-sum payments received in 1983 from the general fund of the Treasury
for the cost of noncontributory wage credits for military service in 1940-56.
2/ Figures shown are preliminary.
3/ Between -0.005 and 0.005 percent of taxable payroll.
Notes: 
1. The income rate excludes interest income and certain transfers from the
general fund of the Treasury.
2. Totals do not necessarily equal the sums of rounded components.