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
11820
11819
11818
11817
11816
11815
11814
11813
11812
11811
11810
11809
11808
11807
11806
11805
11804
11803
11802
11801
11800