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

• Table 3.C6—The correct source for this table is Social Security Administration, Master Beneficiary Record, 10 percent sample.
• Table 4.B3—The median earnings for "All workers, women" for 2000–2003 were incorrectly reported as being the same as the data for men.
• Table 4.B8—The data for "All self-employed workers" for 2000–2003 were not updated from the 2004 Supplement.
• Table 4.B14—The data for "Medicare (HI) taxable earnings" were incorrect because of the inconsistent weighting of sample outlier records.
• Table 8.C2—The data were incorrectly referred to as being "in thousands"; they represented the actual numbers.

The original print and electronic versions of this report contained several errors. The following information has been corrected in the electronic versions of this report and distributed as an insert for the print edition:

• Tables 3.C7a, 3.C7b, and 3.C8—The years shown in the tables were incorrectly labeled. Data for the number of persons are for March 2005 (not March 2004); data for average annual benefits are for 2004 (not 2003); and the correct source is the March 2005 Income Supplement from the Current Population Survey (not March 2004).

The electronic versions originally posted contained errors. The following information has been corrected in the current electronic versions and in the print edition:

• Program Descriptions—Social Security, Taxation of Benefits: The upper income threshold for single beneficiaries was corrected from $32,000 to $34,000.
• Table 2.B1—Amended date of Social Security Act of 1935 corrected from December 31, 2003 to December 31, 2004 in the source.
• Table 8.B81—Dates in title corrected from 1990–2003 to 1990–2004 to accurately reflect the data included in table.
• Table 8.B9—Dates in title corrected from 1995–2004 to 1996–2004 to accurately reflect the data included in table.

The electronic versions originally posted contained errors. The following information has been corrected in the current electronic versions and in the print edition:

• Table 5.J11—The data in the rows for the Philippines and Thailand were reversed. The table that was originally posted omitted the row stub "Czech Republic," causing the data from Denmark through Poland to be incorrectly labeled and the data for Poland omitted.
• Appendix D—The second bend point in "Step 4 - Computing the Primary Insurance Amount (PIA)" was corrected from $3,689 to $3,779.