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
10760
10759
10758
10757
10756
10755
10754
10753
10752
10751
10750
10749
10748
10747
10746
10745
10744
10743
10742
10741
10740