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Year
1990
605
2000
337
2015
230
2016
21
2014
16
2008
14
2012
13
2010
12
2013
9
1644
5
2006
4
2007
4
2001
3
2005
3
2009
3
1796
2
1972
2
1974
2
1999
2
2011
2