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Year
1981
39
2016
34
2007
23
2008
22
2006
18
1961
13
1971
13
2002
13
2013
12
2009
11
1997
6
2012
6
2001
4
2005
4
2004
3
2010
3
2011
3
1993
2
1994
2
2000
2