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Year
1947
1
1951
4
1961
4
1965
1
1971
4
1981
4
1986
1
1991
8
1999
1
2000
2
2001
53
2004
3
2006
12
2007
9
2008
2
2009
4
2010
2
2011
107
2012
3
2014
50