Year % change from 1990 1991 10.398625085515 1992 20.4927333099731 1993 35.3172815404382 1994 24.8619245465619 1995 54.4951694448616 1996 56.9346415043967 1997 62.2282291301663 1998 65.2992608166058 1999 62.6170095609951 2000 60.9000350402963 2001 69.8978825649497 2002 58.8410004838898 2003 73.9316881079909 2004 70.5261050207739 2005 74.378869032721 2006 69.9187398842002 2007 64.5208656621782 2008 72.6635630975622 2009 30.5584755802506 2010 22.0295005923479 2011 23.2497955982713 2012 24.4700906041948