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Year
1999
6
2000
7
2001
11
2002
14
2003
13
2004
23
2005
20
2006
20
2007
17
2008
15
2009
11
2010
12
2011
14
2012
19
2013
16
2014
14
2015
16
2016
14
2017
13
2018
12
