November 13, 1976
February 28, 1977
November 4, 1977
May 7, 1978
November 18, 1978
May 7, 1979
November 2, 1979
May 4, 1980
December 5, 1980
May 8, 1981
November 20, 1981
May 7, 1982
October 1, 1982
May 4, 1983
November 3, 1983
May 3, 1984
December 20, 1984
May 23, 1985
December 10, 1988
