Y \ X
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
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
9270
9269
9268
9267
9266
9265
9264
9263
9262
9261
9260
9259
9258
9257
9256
9255
9254
9253
9252
9251
9250