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
13490
13489
13488
13487
13486
13485
13484
13483
13482
13481
13480
13479
13478
13477
13476
13475
13474
13473
13472
13471
13470