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
11510
11509
11508
11507
11506
11505
11504
11503
11502
11501
11500
11499
11498
11497
11496
11495
11494
11493
11492
11491
11490