Year % change from 1990 1991 -0.290537080952891 1992 14.6875336854587 1993 14.2130740002156 1994 11.7503301174949 1995 11.5938611620136 1996 6.09066778053251 1997 5.35683006359815 1998 13.9087258812116 1999 10.5112105206425 2000 1.47592837124071 2001 3.33384984369949 2002 7.84062735798212 2003 9.64953648808882 2004 15.8250916244476 2005 12.7740312062089 2006 9.01304974668535 2007 18.8830575617118 2008 15.7137611835723 2009 27.1263945779886 2010 64.2349695483454 2011 65.8773192438288 2012 67.5196689393123