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
10690
10689
10688
10687
10686
10685
10684
10683
10682
10681
10680
10679
10678
10677
10676
10675
10674
10673
10672
10671
10670