Year % change from 1990 1991 -1.89320242393584 1992 4.149525229374 1993 5.67109157519297 1994 12.9247098267265 1995 12.1448437345459 1996 17.9695508375118 1997 16.3619330264592 1998 11.8457491384706 1999 24.1448580552369 2000 26.6802890607539 2001 22.0371037133715 2002 27.6722673300411 2003 33.7416536678647 2004 38.1681749042143 2005 48.1217156879916 2006 41.4660363429756 2007 51.0900314747242 2008 52.102927093743 2009 51.4040644651983 2010 58.503119328326 2011 62.2655025809269 2012 65.6881440269333