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
8260
8259
8258
8257
8256
8255
8254
8253
8252
8251
8250
8249
8248
8247
8246
8245
8244
8243
8242
8241
8240