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
13670
13669
13668
13667
13666
13665
13664
13663
13662
13661
13660
13659
13658
13657
13656
13655
13654
13653
13652
13651
13650