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Historical Values
Year Value
1996 12.1 million (1992 est.)
1997 12.1 million (1992 est.)
1998 12.1 million (1992 est.)
1999 7.5 million (1999 est.)
2000 13.75 million (1997)
2001 13.75 million (1997)
2002 17 million (2001)