TABLE II.F15.--COMPARISON OF SUMMARIZED INCOME RATES AND COST RATES
          FOR VALUATION PERIODS 1/, BY TRUST FUND AND ALTERNATIVE,
                       CALENDAR YEARS 1995-2069
                  [As a percentage of taxable payroll]
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                     OASI                    DI                 Combined
            ---------------------  ---------------------  ---------------------
 Valuation   Income   Cost   Bal-   Income   Cost   Bal-   Income   Cost   Bal-
  period       rate   rate   ance     rate   rate   ance     rate   rate   ance
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Intermediate:
 25-years:
  1995-2019.  11.59  10.93   0.66     1.85   1.98  -0.13    13.44  12.91   0.54
 50-years:
  1995-2044.  11.43  12.52  -1.09     1.84   2.08   -.24    13.28  14.61  -1.33
 75-years:
  1995-2069.  11.43  13.29  -1.87     1.84   2.15   -.31    13.27  15.44  -2.17
Low Cost:
 25-years:
  1995-2019.  11.52   9.86   1.67     1.85   1.59    .26    13.37  11.44   1.93
 50-years:
  1995-2044.  11.34  10.83    .50     1.84   1.58    .25    13.17  12.42    .75
 75-years:
  1995-2069.  11.30  11.00    .29     1.83   1.58    .25    13.13  12.59    .54
High Cost:
 25-years:
  1995-2019.  11.66  12.08   -.43     1.86   2.44   -.58    13.51  14.53  -1.01
 50-years:
  1995-2044.  11.54  14.49  -2.95     1.85   2.68   -.82    13.39  17.16  -3.77
 75-years:
  1995-2069.  11.59  16.27  -4.68     1.86   2.85   -.99    13.44  19.11  -5.67
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1/ Income rates include beginning trust fund balances and cost rates include 
the cost of accumulating a target trust fund balance equal to 100 percent of
annual expenditures by the end of the period.
Note: Totals do not necessarily equal the sums of rounded components.