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
12510
12509
12508
12507
12506
12505
12504
12503
12502
12501
12500
12499
12498
12497
12496
12495
12494
12493
12492
12491
12490