Year % change from 1990 1991 -0.943036415246556 1992 10.0868444057419 1993 17.6503744806381 1994 24.0821933528421 1995 20.7792032456114 1996 39.9366133719459 1997 56.0070474589657 1998 66.6140132376121 1999 72.472719785876 2000 20.6715337336344 2001 24.9074345966781 2002 10.3885890568623 2003 7.16289148330784 2004 21.1251632762584 2005 22.204558571877 2006 19.054128400112 2007 23.0179865463738 2008 27.6727521879862 2009 24.2398161180247 2010 24.3734748225478 2011 25.6172095707733 2012 26.8609443189988