Y \ X
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
8670
8669
8668
8667
8666
8665
8664
8663
8662
8661
8660
8659
8658
8657
8656
8655
8654
8653
8652
8651
8650