Year % change from 1990 1991 4.84020722599745 1992 0.640516719370243 1993 9.79344681423671 1994 46.8223104353092 1995 53.1810536230909 1996 23.0155419498082 1997 16.9649465114714 1998 37.5772051402812 1999 11.9195317230707 2000 -2.44230639843909 2001 -17.6976384310032 2002 -9.93406445535895 2003 -1.57841620130525 2004 -2.26266567987622 2005 -14.3147413039091 2006 -20.4030141963265 2007 -20.3155486779251 2008 -22.2229697907556 2009 -28.0690304783691 2010 -28.3569938774137 2011 -27.774819438545 2012 -27.4806083987208