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Historical Values
Year Value
1990 4.1% (1987)
1991 4.1% (1987)
1992 4.1% (1987)
1993 4.1% (1987)
1994 4.1% (1987)
1995 2.5% (1992)
1996 2.5% (1992)
1997 2.5% (1992)
1998 2.5% (1992)
1999 2.5% (1992)
2000 2.5% (1992)
2001 2.5% (1992)
2002 2.5% (1992) (1992)
2003 1.5% (2002 est.)
2004 1.5% (2002 est.)
2005 1.5% (2002 est.)
2006 1% (2003)