Year % change from 1990 1991 -2.95040711548666 1992 1.05384472638128 1993 -0.899365479341452 1994 2.54671003154696 1995 7.31277733826885 1996 7.91669515335607 1997 7.75033288731317 1998 6.85129297013618 1999 9.83816304804321 2000 17.4975013103877 2001 27.680434690602 2002 28.5472439534967 2003 7.34256627631762 2004 19.5607515277005 2005 22.8030251236322 2006 24.6289405230482 2007 69.8815930407832 2008 45.3952487457718 2009 56.8677338594418 2010 65.8576446879649 2011 67.5162211348446 2012 69.1747975817242