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
8290
8289
8288
8287
8286
8285
8284
8283
8282
8281
8280
8279
8278
8277
8276
8275
8274
8273
8272
8271
8270