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
3260
3259
3258
3257
3256
3255
3254
3253
3252
3251
3250
3249
3248
3247
3246
3245
3244
3243
3242
3241
3240