Years

20s-30s       40s-50s        60s-70s        80s-90s        00s-10s

1920s           1930s

1920                               1930
1921                               1931
1922                               1932
1923                               1933
1924                               1934
1925                               1935
1926                               1936
1927                               1937
1928                               1938
1929                               1939

1940s           1950s

1940                               1950
1941                               1951
1942                               1952
1943                               1953
1944                               1954
1945                               1955
1946                               1956
1947                               1957
1948                               1958
1949                               1959

1960s           1970s

1960                               1970
1961                               1971
1962                               1972
1963                               1973
1964                               1974
1965                               1975
1966                               1976
1967                               1977
1968                               1978
1969                               1979

1980s            1990s

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

2000s           2010s

2000                              2010
2001                              2011
2002                              2012
2003                              2013
2004                              2014
2005                              2015
2006                                  
2007                                  
2008                                  
2009                                 !