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1985
to
1986
4
1987
to
1989
2
1990
to
1991
0
1992
to
1994
1
1995
to
1996
3
1997
to
1999
0
2000
to
2001
1
2002
to
2004
5
2005
to
2006
0
2007
to
2009
2
2010
to
2011
0
2012
1