Year % change from 1990 1991 3.87896322367047 1992 4.90152215627204 1993 2.73013789880792 1994 -0.753621459321352 1995 -1.81744066970899 1996 -1.14832821308199 1997 -1.41627146280113 1998 -1.06282498682654 1999 -0.577643889004886 2000 -0.811783537646282 2001 -0.368856941171802 2002 0.768037700957436 2003 1.2243863155069 2004 1.93674749704218 2005 2.7743808472773 2006 3.21084499060458 2007 4.14839780873126 2008 5.14958093476898 2009 3.11987353476302 2010 4.64998359531124 2011 5.69648343126434 2012 6.74298326721745