Y \ X
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
7540
7539
7538
7537
7536
7535
7534
7533
7532
7531
7530
7529
7528
7527
7526
7525
7524
7523
7522
7521
7520