TABLE II.F21.--CHANGE IN ACTUARIAL BALANCE
         OVER THE NEXT 75 YEARS BASED ON INTERMEDIATE ASSUMPTIONS
                   BY TRUST FUND AND REASON FOR CHANGE
                   [As a percentage of taxable payroll]
-------------------------------------------------------------------------------
              Item                                     OASI        DI  Combined 
-------------------------------------------------------------------------------
Shown in last year's report:
Income rate......................................     11.81      1.43     13.24 
Cost rate........................................     13.28      2.09     15.37 
Actuarial balance................................     -1.46      -.66     -2.13
Changes in actuarial balance due to changes in:
  Legislation....................................      -.40      +.40      +.00 
  Valuation period...............................      -.06      -.01      -.07
  Demographic assumptions........................      +.11      +.01      +.12
  Economic assumptions...........................      +.02      +.00      +.02
  Disability assumptions.........................      -.00      -.05      -.05
  Methods........................................      -.06      -.01      -.07
 Total change in actuarial balance...............      -.40      +.35      -.05 
Shown in this report:
Actuarial balance................................     -1.87      -.31     -2.17
Income rate......................................     11.43      1.84     13.27 
Cost rate........................................     13.29      2.15     15.44 
-------------------------------------------------------------------------------
Note: Totals do not necessarily equal the sums of rounded components.