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Year
1951
2
1953
1
1961
2
1964
2
1971
2
1981
2
1982
1
1989
3
1990
3
1991
6
1992
4
1993
2
1996
5
1998
1
1999
4
2000
6
2001
509
2002
108
2003
11
2004
18