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1973
to
1974
2
1975
to
1979
8
1980
to
1984
0
1985
to
1989
0
1990
to
1994
0
1995
to
1999
1
2000
to
2004
5
2005
to
2009
9
2010
to
2014
26
2015
to
2018
21