Table IV.B1.­ Estimated Income Rates and Cost Rates, Calendar Years 1970-2000
[As a percentage of taxable payroll]
 
Calendar
year		 OASI
  DI
  Combined
Income
rate		 Cost
rate		 Balance Income
rate		 Cost
rate		 Balance Income
rate		 Cost
rate		 Balance
1970 7.30 7.31 -0.01   1.10 0.81 0.29   8.40 8.12 0.28
1971 8.10 8.25 -0.15   1.10 0.96 0.14   9.20 9.22 -0.02
1972 8.10 8.12 -0.02   1.10 1.01 0.09   9.20 9.13 0.07
1973 8.60 8.58 0.02   1.10 1.09 0.01   9.70 9.68 0.02
1974 8.75 8.57 0.18   1.15 1.16 -0.01   9.90 9.73 0.17
1975 8.75 9.29 -0.54   1.15 1.36 -0.21   9.90 10.64 -0.74
1976 8.75 9.41 -0.66   1.15 1.44 -0.29   9.90 10.85 -0.95
1977 8.75 9.44 -0.69   1.15 1.50 -0.35   9.90 10.94 -1.04
1978 8.55 9.25 -0.70   1.55 1.45 0.10   10.10 10.70 -0.60
1979 8.66 8.87 -0.21   1.50 1.35 0.15   10.16 10.22 -0.06
1980 9.04 9.33 -0.29   1.12 1.38 -0.26   10.16 10.71 -0.55
1981 9.40 9.96 -0.56   1.30 1.39 -0.09   10.70 11.35 -0.65
1982 9.15 10.59 -1.44   1.65 1.34 0.31   10.80 11.93 -1.13
1983 9.91 10.26 -0.35   1.33 1.22 0.11   11.24 11.48 -0.24
1984 10.58 10.06 0.52   1.01 1.15 -0.14   11.59 11.21 0.38
1985 10.71 9.92 0.79   1.07 1.13 -0.06   11.79 11.05 0.73
1986 10.59 9.81 0.77   1.01 1.11 -0.10   11.60 10.93 0.67
1987 10.57 9.59 0.97   1.00 1.10 -0.10   11.56 10.69 0.87
1988 11.22 9.57 1.65   1.06 1.08 -0.01   12.28 10.65 1.64
1989 11.17 9.51 1.66   1.06 1.06 0.00   12.23 10.57 1.66
1990 11.32 9.66 1.66   1.17 1.09 0.09   12.49 10.74 1.75
1991 11.44 10.15 1.29   1.21 1.18 0.03   12.65 11.33 1.32
1992 11.43 10.27 1.16   1.21 1.27 -0.06   12.64 11.54 1.10
1993 11.40 10.37 1.03   1.21 1.35 -0.14   12.61 11.73 0.88
1994 10.70 10.22 0.48   1.89 1.40 0.49   12.59 11.62 0.97
1995 10.70 10.22 0.48   1.88 1.44 0.44   12.59 11.67 0.92
1996 10.73 10.06 0.68   1.89 1.48 0.41   12.62 11.53 1.09
1997 10.93 9.83 1.09   1.71 1.44 0.28   12.64 11.27 1.37
1998 10.96 9.49 1.47   1.72 1.43 0.29   12.68 10.91 1.77
1999 10.99 9.13 1.86   1.72 1.43 0.29   12.71 10.56 2.15
2000 10.89 9.04 1.86   1.80 1.43 0.37   12.69 10.47 2.22
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.
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