1989
1994
1992
1994
1989
1994
1999
1992
1992
1993
1994
1979
1993
1992
1993
1992
1989
1990
1991
1992
1992
1988
1988
1992
1993
1992
1980
1990
1995
1995
1993
1990
1994
2000
2001
1988
1989
1982
1982
1983
1992
1992
1988
1992
1999
1991
1988
1988
2000
1987
1970
1994
1996
1999
1993
1992
1982
1988
1992
1982
1980
1980
1986
1987
1986
1987
1987
1987
1993
1989
1993
1989
1987
1981
1990
1980
1978
1981
1980
1980
1994
1988
1992
1987
1982
1990
1982
1984
1990
1990
1982
1990
1980
1982
1984
1978
1982
1982
1978
1996
1982
1987
1982
1980
1984
1986
1986
1997
1978
1990
1981
1992
1992
1995
1999
2003
1983
1976
1992
2000
1988
1983
1988
1986
1986
1976
1978
1991
2004
2000
1998
2001
1991
1995
1981
1987
1987
1976
2000
1997
1992
1992
1995
2000
1983
Comments