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
9690
9689
9688
9687
9686
9685
9684
9683
9682
9681
9680
9679
9678
9677
9676
9675
9674
9673
9672
9671
9670