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
11900
11899
11898
11897
11896
11895
11894
11893
11892
11891
11890
11889
11888
11887
11886
11885
11884
11883
11882
11881
11880