Year % change from 1990 1991 4.7652408884115 1992 3.74802825221252 1993 0.861681415719873 1994 2.36305879248926 1995 1.45998337055986 1996 3.48464415283702 1997 23.2060577686758 1998 13.0979829186539 1999 -0.63946156912712 2000 -1.36183085221218 2001 -0.446224163515263 2002 11.0214551748223 2003 15.6700394281204 2004 18.971964505107 2005 27.7834382347977 2006 37.5884108581781 2007 39.238234615773 2008 33.9315251962713 2009 34.7471451399104 2010 47.7806503990923 2011 55.2276953413643 2012 59.4297670976202