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
10650
10649
10648
10647
10646
10645
10644
10643
10642
10641
10640
10639
10638
10637
10636
10635
10634
10633
10632
10631
10630