from Social Security Bulletin, Vol. 61, No. 1 (released January 1998)

from Social Security Bulletin, Vol. 57, No. 1 (released January 1994)

from Social Security Bulletin, Vol. 56, No. 1 (released January 1993)

from Social Security Bulletin, Vol. 53, No. 4 (released April 1990)

from Social Security Bulletin, Vol. 52, No. 6 (released June 1989)

from Social Security Bulletin, Vol. 51, No. 2 (released February 1988)

from Social Security Bulletin, Vol. 49, No. 3 (released March 1986)

from Social Security Bulletin, Vol. 48, No. 7 (released July 1985)

from Social Security Bulletin, Vol. 47, No. 5 (released May 1984)

from Social Security Bulletin, Vol. 47, No. 3 (released March 1984)

from Social Security Bulletin, Vol. 45, No. 11 (released November 1982)

from Social Security Bulletin, Vol. 45, No. 2 (released February 1982)