Year % change from 1990 1991 -4.88128907502645 1992 0.397109563179487 1993 5.7697825421281 1994 6.41089628134743 1995 6.71107928447947 1996 7.31723195104486 1997 8.98234345275555 1998 9.61863497505708 1999 11.7999647978165 2000 14.7205404740721 2001 15.7033082819165 2002 20.5602451615081 2003 20.2923710117252 2004 24.9327903517084 2005 24.6972250552747 2006 26.9002548541641 2007 28.3707899032422 2008 29.2286622929159 2009 25.2635944322684 2010 27.7769338898172 2011 29.0547032287154 2012 30.3324725676135