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Historical Values
Year Value
1990 25-30% (1985)
1991 30% (1986)
1992 30% (1986)
1993 32.1% (1990)
1994 32.1% (1990)
1995 32.1% (1990)
1996 32.1% (1990)
1997 23.5% (1993)
1998 23.5% (1994)
1999 24% (1997)
2000 24% (1997)
2001 27.2% (1998)
2002 27.2% (1998) (1998)
2003 27.2% (1998)
2004 27.2% (1998)
2005 27.2% (1998)
2006 27.2% (1998)