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
10700
10699
10698
10697
10696
10695
10694
10693
10692
10691
10690
10689
10688
10687
10686
10685
10684
10683
10682
10681
10680