[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]
[1980,1981]
[1982,1983]
[1984,1985]
[1986,1987]
[1988,1989]
[1990,1991]
[1992,1993]
[1994,1995]
[1996,1997]
[1998,1999]