Year % change from 1990 1991 0.0669851169475599 1992 16.245354126901 1993 21.1292520103664 1994 21.2406228965535 1995 33.1561696219243 1996 13.7285346843083 1997 8.18161421125025 1998 9.64520649950737 1999 4.70407861321298 2000 0.80284589195887 2001 -0.742364184423672 2002 -1.11761090751825 2003 3.24568905248579 2004 11.8908337696037 2005 15.1487167147377 2006 19.3673158153162 2007 25.2610305952896 2008 31.003541106425 2009 18.5008990963513 2010 29.1126748197743 2011 30.403801567972 2012 31.6949283161698