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
5850
5849
5848
5847
5846
5845
5844
5843
5842
5841
5840
5839
5838
5837
5836
5835
5834
5833
5832
5831
5830