TABLE II.F13.--COMPARISON OF ESTIMATED INCOME RATES AND COST RATES 
         BY TRUST FUND AND ALTERNATIVE, CALENDAR YEARS 1995-2070
                   [As a percentage of taxable payroll
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                     OASI                    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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Intermediate:
  1995......  10.69  10.05   0.64     1.89   1.44   0.45    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    (1)    12.66  11.86    .79
  2004......  10.84  10.04    .81     1.82   1.86   -.05    12.66  11.90    .76

  2005......  10.85  10.02    .83     1.82   1.90   -.09    12.67  11.92    .75
  2010......  10.89  10.21    .68     1.82   2.08   -.26    12.71  12.29    .42
  2015......  10.94  11.24   -.30     1.82   2.16   -.34    12.77  13.40   -.63
  2020......  11.05  12.76  -1.71     1.83   2.21   -.38    12.88  14.97  -2.09
  2025......  11.16  14.11  -2.95     1.83   2.27   -.44    12.99  16.39  -3.40
  2030......  11.24  15.01  -3.77     1.83   2.25   -.42    13.08  17.26  -4.19
  2035......  11.30  15.37  -4.07     1.84   2.20   -.37    13.13  17.57  -4.44
  2040......  11.32  15.27  -3.94     1.84   2.21   -.38    13.16  17.48  -4.32
  2045......  11.34  15.16  -3.82     1.84   2.31   -.47    13.18  17.47  -4.29
  2050......  11.37  15.28  -3.92     1.84   2.38   -.53    13.21  17.66  -4.45
  2055......  11.40  15.66  -4.25     1.84   2.41   -.57    13.25  18.07  -4.82
  2060......  11.44  16.09  -4.65     1.84   2.39   -.55    13.28  18.49  -5.20
  2065......  11.46  16.41  -4.94     1.85   2.38   -.54    13.31  18.79  -5.48
  2070......  11.48  16.64  -5.15     1.85   2.40   -.56    13.33  19.04  -5.71
Low Cost:
  1995......  10.67   9.94    .73     1.89   1.41    .48    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

  2005......  10.82   8.92   1.90     1.81   1.52    .30    12.64  10.44   2.20
  2010......  10.84   8.97   1.87     1.82   1.59    .23    12.66  10.56   2.10
  2015......  10.89   9.85   1.04     1.82   1.62    .20    12.71  11.47   1.24
  2020......  10.98  11.09   -.11     1.82   1.62    .20    12.80  12.71    .09
  2025......  11.06  12.09  -1.03     1.82   1.65    .18    12.88  13.73   -.85
  2030......  11.12  12.59  -1.47     1.82   1.61    .21    12.94  14.20  -1.26
  2035......  11.15  12.58  -1.43     1.82   1.56    .26    12.98  14.14  -1.16
  2040......  11.16  12.16  -1.00     1.83   1.55    .28    12.99  13.71   -.72
  2045......  11.16  11.77   -.61     1.83   1.59    .24    12.99  13.36   -.37
  2050......  11.17  11.58   -.41     1.83   1.60    .22    13.00  13.19   -.19
  2055......  11.18  11.58   -.40     1.83   1.61    .22    13.01  13.19   -.18
  2060......  11.19  11.60   -.40     1.83   1.59    .24    13.02  13.19   -.16
  2065......  11.20  11.55   -.34     1.83   1.59    .24    13.03  13.13   -.10
  2070......  11.20  11.49   -.28     1.83   1.60    .23    13.04  13.09   -.05
High Cost:
  1995......  10.71  10.12   0.60     1.89   1.48   0.41    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

  2005......  10.88  11.22   -.34     1.82   2.41   -.59    12.71  13.63   -.92
  2010......  10.94  11.54   -.60     1.83   2.66   -.83    12.77  14.20  -1.43
  2015......  11.02  12.70  -1.68     1.83   2.75   -.91    12.85  15.44  -2.60
  2020......  11.15  14.51  -3.36     1.84   2.85  -1.01    12.99  17.36  -4.37
  2025......  11.28  16.27  -4.99     1.84   2.98  -1.14    13.12  19.25  -6.13
  2030......  11.39  17.71  -6.32     1.85   2.99  -1.15    13.24  20.70  -7.46
  2035......  11.48  18.67  -7.19     1.85   2.97  -1.12    13.33  21.64  -8.31
  2040......  11.54  19.18  -7.64     1.85   3.04  -1.18    13.39  22.21  -8.82
  2045......  11.59  19.67  -8.08     1.86   3.23  -1.38    13.45  22.90  -9.46
  2050......  11.65  20.47  -8.82     1.86   3.38  -1.51    13.51  23.84 -10.33
  2055......  11.73  21.62  -9.90     1.87   3.48  -1.62    13.59  25.10 -11.51
  2060......  11.81  22.92 -11.11     1.87   3.47  -1.60    13.67  26.39 -12.72
  2065......  11.88  24.08 -12.20     1.87   3.45  -1.58    13.75  27.53 -13.79
  2070......  11.94  25.07 -13.12     1.87   3.47  -1.60    13.81  28.54 -14.73
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1/ Negligible, i.e., 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.