1975
    August
    December
 

1976
    March
    September
    November
 

1977
    January
    February
    April
    July
    August
    October
    December
 

1978
    February
    April
    June
    August
    October
    December
 

1979
    February
    April
    June
    September
    November
 

1980
    January
    April
    June
    August
    September
    October
    November
 

1981
    January-February
    March-April
    May
    July
    August
    October
    November
    December-January
 

1982
    February
    March-April
    May-June
    July-August
    September-October
    November
    December-January
 

1983
    February-March
    April-May-June
    July-August
    September-October
    November-December
 

1984
    January-February
    March-April
    August
    October
    November
 

1985
    January
    April
    July
    August
    November
 

1986
    February
    April
    May-June
    August
    September-October
 

1987
    January
    April-May
    May-June
    July-August
    September-October
    November-December
    December-January
 

1988
    February - March
    April-May
    June-July
    August-September
    September-October
    November-December
 

1989
    January-February
    March-April
    May-June
    July-September
    September-October
    November-December 

1990
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1991
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1992
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1993
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1994
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1995
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1996
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1997
    January-February
    March-April
    May-June
    July-August
    September-October
    November-December
 

1998
    January-February
    March-April
    May-June
    July-August
    September-October
    November-February

1999
    March-April
    May-June
    July-August
    September-October
    November-December