Y \ X
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
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
13720
13719
13718
13717
13716
13715
13714
13713
13712
13711
13710
13709
13708
13707
13706
13705
13704
13703
13702
13701
13700