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
13280
13279
13278
13277
13276
13275
13274
13273
13272
13271
13270
13269
13268
13267
13266
13265
13264
13263
13262
13261
13260