The original print and web versions of this report contained an error in Table 6.B1. Data shown for columns "One-half or more of entitlement months" and "Less than one-half of entitlement months" were incorrectly transposed. Corrected data now appear in the web versions of this report.

The original print and web versions of this report contained an error in Table 3.E3. Footnote e, reading "Less than 0.05 percent," was incorrect. The corrected footnote, "Less than 0.5 percent," now appears in the web versions of this report.

The original print and Web versions of this report contained errors in Table 2.A16. For December 1994, the values given for the three highest AMW brackets ("next 175," "next 250," and "next 50," the three rows shown at the bottom of the column) were incorrect. The correct values are 21.09, 20.56, and 20.00, respectively. These errors have been corrected in the Web versions of this report.

The original print and electronic versions of this report contained the following errors:

• In Table 2.A12, the "amount (dollars)" for the special minimum primary insurance amount (PIA) for 1981 was incorrect. The correct value is 5,550.
• In Table 8.B1, the number of "persons served per 1000 enrollees, Hospital Insurance, Inpatient hospital" for 1990 was incorrect. The correct value is 194.

The original print and electronic version of this report contained errors. The following information has been corrected in the electronic version of this report:

• Table 3.C6—The correct source for this table is Social Security Administration, Master Beneficiary Record, 10 percent sample.
• Table 8.C2—The data were labeled incorrectly as "in thousands" when actual numbers were represented.