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1967
to
1969
4
1970
to
1974
7
1975
to
1979
12
1980
to
1984
22
1985
to
1989
17
1990
to
1994
15
1995
to
1999
4
2000
to
2004
9
2005
to
2009
8
2010
to
2014
2,256
2015
to
2019
3,227
2020
702