Y \ X
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
1690
1689
1688
1687
1686
1685
1684
1683
1682
1681
1680
1679
1678
1677
1676
1675
1674
1673
1672
1671
1670