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
4470
4469
4468
4467
4466
4465
4464
4463
4462
4461
4460
4459
4458
4457
4456
4455
4454
4453
4452
4451
4450