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
4610
4609
4608
4607
4606
4605
4604
4603
4602
4601
4600
4599
4598
4597
4596
4595
4594
4593
4592
4591
4590