September,1980
October,1980
November,1980
December,1980

January,1981
February,1981
March,1981
April,1981
May,1981
June,1981
July,1981
August,1981
September,1981
October,1981
November,1981
December,1981

January, 1982
Ferbuary, 1982
March, 1982
April, 1982
May, 1982
June, 1982
July, 1982
August, 1982
September, 1982
October, 1982
November, 1982
December, 1982

January, 1983
February, 1983
March, 1983
April, 1983
May, 1983
June, 1983
July, 1983
August,1983
September,1983
October,1983
Novermber,1983
December,1983

January, 1984
February, 1984
March, 1984
April, 1984
May, 1984
June, 1984
August, 1984
September, 1984
October, 1984
November, 1984
December, 1984

January, 1985
February, 1985
March, 1985
April, 1985
May, 1985
June,1985
July,1985
August,1985
September,1985
October,1985
November,1985
December,1985

January, 1986
February,1986
March,1986
April,1986
May,1986
June,1986
July,1986
August,1986
September,1986
October,1986
November,1986
December,1986

January, 1987
February, 1987
March, 1987
April, 1987
May, 1987
June, 1987
August, 1987
September, 1987
October, 1987
November, 1987
December, 1987

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

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

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

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

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

January, 1993
February, 1993