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
10440
10439
10438
10437
10436
10435
10434
10433
10432
10431
10430
10429
10428
10427
10426
10425
10424
10423
10422
10421
10420