January 17, 1980
February 11-12, 1980
March 20, 1980
May 1, 1980
June 12, 1980
July 28, 1980
September 18, 1980
November 20, 1980
January 13, 1981
March 18, 1981
May 20, 1981
July 10, 1981
September 17, 1981
November 10, 1981
January 21, 1982
March 18, 1982
April 22, 1982
May 20, 1982
July 14, 1982
August 16, 1982
September 13, 1982
November 17, 1982
December 20, 1982
January 20, 1983
March 7, 1983
March 21, 1983
May 19, 1983
July 21, 1983
August 8, 1983
October 13, 1983
November 17, 1983
February 16, 1984
March 15, 1984
March 25, 1984
April 23, 1984
May 17, 1984
July 19, 1984
September 20, 1984
October 22, 1984
November 15, 1984
January 17, 1985
February 26, 1985
March 21, 1985
May 16, 1985
July 18, 1985
September 26, 1985
November 14, 1985
January 16, 1986
February 24, 1986
March 27, 1986
May 22, 1986
July 17, 1986
September 18, 1986
October 20, 1986
November 20, 1986
1987
January 21, 1987
March 18, 1987
May 14, 1987
July 15, 1987
September 16, 1987
November 18, 1987
January 20, 1988
March 16, 1988
May 25, 1988
July 20, 1988
October 3, 1988
November 16, 1988
January 18, 1989
February 14, 1989
March 15, 1989
May 24, 1989
July 19, 1989
September 20, 1989
October 23, 1989
November 15, 1989