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2002
to
2003
1,067
2004
to
2005
1,237
2006
to
2007
1,437
2008
to
2009
2,086
2010
to
2011
3,194
2012
to
2013
5,154
2014
to
2015
4,506
2016
to
2017
4,053
2018
2,361