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
8720
8719
8718
8717
8716
8715
8714
8713
8712
8711
8710
8709
8708
8707
8706
8705
8704
8703
8702
8701
8700