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1924
to
1929
4
1930
to
1939
6
1940
to
1949
3
1950
to
1959
3
1960
to
1969
4
1970
to
1979
3
1980
to
1989
3
1990
to
1999
3
2000
to
2009
3
2010
to
2012
3