Notes
1. Amounts shown are effective for calendar years.
2. Amounts shown for 1967-1982 are for the 12-month periods ending June30; amounts shown for 1983 are for the period July1,1982 through December31,1983; amounts shown for 1984 and later are for calendar years.
3. Anomalies in the 1989 values are due to the Medicare Catastrophic Coverage Act of 1988. Most of the provisions of the Act were repealed the following year.

