February 12, 1968
October 19, 1970
July 28, 1971
October 25, 1971
January 21, 1973
August 11, 1973
June 02, 1969
June 26, 1975
November 02, 1975
May 27, 1976
October 03, 1976
September 18, 1977
January 01, 1978
June 15, 1978
August 04, 1983
May 24, 1979
March 13, 1980
June 21, 1984
February 23, 1984
July 05, 1984
June 20, 1985
January 24, 1988
March 22, 1990
August 09, 1990
January 01, 1991