Year % change from 1990 1991 -0.591476876767849 1992 6.83302197834375 1993 10.2009264519 1994 13.1495265256882 1995 19.9995315034639 1996 23.8482305471454 1997 27.6588642472725 1998 26.922153444328 1999 35.39667016087 2000 41.8554805310408 2001 40.5114810932367 2002 42.5834070239343 2003 48.1836974917867 2004 52.4194917983825 2005 56.2506222219619 2006 58.2715991543637 2007 75.1714404511622 2008 79.7076581615025 2009 61.1815482639275 2010 65.7441189044208 2011 67.401560093465 2012 69.0590012825093