The original version of this report contained an error in Table 5.H1. The number of “Disabled-worker families” comprising a worker, wife, and 2 or more children was incorrect for 2004. The corrected value now appears in this report.

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

• Table 2.F9—The data for 2005 DI/SSI "Hearing level receipts" and "End-of-year pending cases" were incorrect; the correct data are 218,960 (receipts) and 263,384 (pending cases).
• Table 3.C3—The Hospital Insurance tax amounts for the total, employer, and employee contributions for 2005 were incorrect; the correct data are 182,565 (total hospital insurance amount), 80,159 (employer hospital insurance amount), and 80,159 (employee hospital insurance amount).
• Table 7.A3—The column heading "Federal SSI and state supplementation" was incorrectly labeled; the data were for "Federally administered state supplementation."