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Year
1951
2
1953
3
1961
2
1964
3
1971
2
1981
2
1982
3
1989
6
1990
4
1991
6
1992
1
1998
2
2000
179
2001
497
2002
2
2003
2
2004
2
2005
2
2006
2
2007
2