Year % change from 1990 1991 -10.2316334173503 1992 17.6833648462557 1993 -7.89462241600511 1994 -6.8819425888038 1995 -2.0947942528281 1996 -10.7714452468544 1997 -9.34835367901671 1998 34.054224597301 1999 18.5166690327161 2000 11.9879325043872 2001 5.04334869213499 2002 11.5065533430785 2003 19.6082891277795 2004 21.2488388359309 2005 30.5121702729771 2006 21.4931464088894 2007 38.9307023749298 2008 25.5417728146658 2009 18.597725776487 2010 25.2643635996859 2011 42.6995785855296 2012 43.6746526130061