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
7490
7489
7488
7487
7486
7485
7484
7483
7482
7481
7480
7479
7478
7477
7476
7475
7474
7473
7472
7471
7470