Year % change from 1990 1991 -9.51177552186385 1992 1.61283678962869 1993 3.85644984420355 1994 5.30709464729717 1995 11.2168958071586 1996 8.69855745486561 1997 9.47428727309507 1998 10.3944774925362 1999 14.8977281469075 2000 13.8615016914504 2001 10.8588999151154 2002 14.5426094044834 2003 11.7351690195997 2004 14.7020066480118 2005 20.5880492733085 2006 43.3208677666091 2007 101.498727451982 2008 68.471159240407 2009 68.3954774581508 2010 64.2372114642715 2011 65.9542030723361 2012 67.6711946804008