Year % change from 1990 1991 -15.7338056410424 1992 -17.628200488932 1993 -19.759060247063 1994 -20.9367486341828 1995 -18.5116918828697 1996 -14.8692708801286 1997 -8.56593305693233 1998 184.185058463219 1999 92.3696660253866 2000 18.4756514559319 2001 23.4735573105991 2002 16.8136194402991 2003 17.7104795343486 2004 31.8981721547341 2005 18.8400140108816 2006 41.2758054477911 2007 62.4858938145679 2008 63.3721857369169 2009 48.3457509683941 2010 57.4040115519155 2011 59.6193248641122 2012 61.7061382899377