Year % change from 1990 1991 -0.714925343160555 1992 2.25163117838814 1993 7.27149794612383 1994 0.104165277328061 1995 4.45694524185793 1996 5.20667425433641 1997 6.20565512928899 1998 20.4743079397293 1999 11.4570236499808 2000 8.41224910626453 2001 9.93239444102178 2002 11.4731579643279 2003 19.6924925800197 2004 26.8565448910552 2005 30.0285834179763 2006 12.8387222869704 2007 15.7040302924176 2008 16.7930764235209 2009 16.1527426441122 2010 21.9155516068606 2011 23.4438795181332 2012 24.972207429406