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1988
to
1989
5
1990
to
1991
4
1992
to
1993
1
1994
to
1995
5
1996
to
1997
0
1998
to
1999
5
2000
to
2001
7
2002
to
2003
8
2004
to
2005
9
2006
to
2007
10
2008
2