Year % change from 1990 1991 9.4728304947288 1992 15.5555555555557 1993 18.3454987834555 1994 23.9578264395781 1995 34.0145985401461 1996 80.8921330089213 1997 99.8702351987023 1998 97.7591078669911 1999 173.708885644769 2000 142.234841849148 2001 88.5229683698297 2002 143.582157339823 2003 108.566906244933 2004 88.6903341443633 2005 95.2598264395783 2006 72.4231088402271 2007 74.8365904298459 2008 81.4243925385239 2009 51.9524298459053 2010 45.4610624493101 2011 45.4610624493114 2012 45.4610624493108