Table IV.B1.- Estimated Annual Income Rates, Cost Rates, and Balances
Calendar Years 1970-2003
Historical Period
[As a percentage of taxable payroll]

OASI
 DI
 Combined
Calendar
year		 Income
rate 1		 Cost
rate		 Balance Income
rate 1		 Cost
rate		 Balance Income
rate 1 		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 -.15 1.10 .96 .14 9.20 9.22 -.02
1972 8.10 8.12 -.02 1.10 1.01 .09 9.20 9.13 .07
1973 8.60 8.58 .02 1.10 1.09 .01 9.70 9.68 .02
1974 8.75 8.57 .18 1.15 1.16 -.01 9.90 9.73 .17
1975 8.75 9.29 -.54 1.15 1.36 -.21 9.90 10.64 -.74
1976 8.75 9.41 -.66 1.15 1.44 -.29 9.90 10.85 -.95
1977 8.75 9.44 -.69 1.15 1.50 -.35 9.90 10.94 -1.04
1978 8.55 9.25 -.70 1.55 1.45 .10 10.10 10.70 -.60
1979 8.66 8.87 -.21 1.50 1.35 .15 10.16 10.22 -.06
1980 9.04 9.33 -.29 1.12 1.38 -.26 10.16 10.71 -.55
1981 9.40 9.96 -.56 1.30 1.39 -.09 10.70 11.35 -.65
1982 9.15 10.59 -1.44 1.65 1.34 .31 10.80 11.93 -1.13
1983 9.91 10.26 -.35 1.33 1.22 .11 11.24 11.48 -.24
1984 10.58 10.06 .52 1.01 1.15 -.14 11.59 11.21 .38
1985 10.71 9.92 .79 1.07 1.13 -.06 11.79 11.05 .73
1986 10.59 9.81 .77 1.01 1.11 -.10 11.60 10.93 .67
1987 10.57 9.59 .97 1.00 1.10 -.10 11.56 10.69 .87
1988 11.22 9.57 1.65 1.06 1.08 -.01 12.28 10.65 1.64
1989 11.17 9.51 1.66 1.06 1.06 .00 12.23 10.57 1.66
1990 11.32 9.66 1.66 1.17 1.09 .09 12.49 10.74 1.75
1991 11.44 10.15 1.29 1.21 1.18 .03 12.65 11.33 1.32
1992 11.43 10.27 1.16 1.21 1.27 -.06 12.64 11.54 1.10
1993 11.40 10.37 1.03 1.21 1.35 -.14 12.61 11.73 .88
1994 10.70 10.22 .48 1.89 1.40 .49 12.59 11.62 .97
1995 10.70 10.22 .48 1.88 1.44 .44 12.59 11.67 .92
1996 10.73 10.06 .68 1.89 1.48 .41 12.62 11.53 1.09
1997 10.93 9.83 1.09 1.71 1.44 .28 12.64 11.27 1.37
1998 10.96 9.45 1.51 1.72 1.42 .30 12.68 10.87 1.80
1999 10.99 9.09 1.90 1.72 1.42 .30 12.71 10.51 2.20
2000 10.89 8.98 1.92 1.80 1.42 .37 12.69 10.40 2.29
2001 10.89 9.08 1.81 1.82 1.48 .34 12.71 10.56 2.15
2002 10.91 9.31 1.61 1.82 1.61 .22 12.74 10.91 1.82
2003 10.89 9.36 1.53 1.82 1.68 .14 12.71 11.04 1.67
1 Historical income rates for DI in 2000 and for OASI in 2002 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.

Notes:
1. The income rate excludes interest income and certain transfers from the general fund of the Treasury.
2. Some historical values are subject to change due to revisions of taxable payroll.
3. Totals do not necessarily equal the sums of rounded components.

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