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Historical Values
Year Value
1993 60 km2 (1989 est.)
1994 60 sq km (1989 est.)
1995 60 sq km (1989 est.)
1996 60 sq km (1989 est.)
1997 40 sq km (1993 est.)
1998 40 sq km (1993 est.)
1999 40 sq km (1993 est.)
2000 40 sq km (1993 est.)
2001 40 sq km (1993 est.)
2002 30 sq km (1998 est.)
2003 30 sq km (1998 est.)
2004 30 sq km (1998 est.)
2005 30 sq km (1998 est.)
2006 70 sq km (2003)