Table of Contents

1956
  September 14
1957
  July 6
1958
  June 9
  October 3
1959
  April 15
1960
  October 12/13
1961
  January 9/10
  January 10
  October 10
1962
  October
  November 16
  November 23
1965
  September 19
1966
  May 19
  October 6
  November 30
  December 5-7
1968
  June 20/21
  July
1969
  July 29
  November 9
1971
  July 24
1973
  March 11
  May 22
  May 29
  November 4
1974
  July 2
1976
  June 18
  August 20
  August 21-22
1977
  April 17
1978
  1978 or 1979
  April
  April
  June 3
  June 14
1979
  December 15
1980
  February 8/9
  September 14
1981
  ca
  November 8
  November 16
1983
  August 27
1984
  Summer
  October 22-24
1985
  February 22
1986
  February 8
  April 9
  April 12
1987
  November 3
  November 7
  November 13
  November 16/17
1988
  June 17
  June 20
  June 21
  June 26
  June 30
  July 2
  July 3
  July 9
  July 10
  July 15
  July 16
  July 17
1989
  June 8
  November 1
  November 2
  November 3/4
1990
  January 16-March 11
  June 29
  July 8
  August [?]
  September 22-23
  September 26
  September 30
  ca 1990-1991
1991
  March 19
1993
  April 8
1996
  November 2
  November 3
1998
  March 29
  August 4-5
1999
  February 12
  November 9
2000
  February 19
  May 22
  September 3
  September 10
2002
  May 19
2003:
  October 30
2008:
  November 6 and 9