Year % change from 1990 1991 -14.4585174153014 1992 -5.40981965181913 1993 -8.37599028798137 1994 -16.2163176931453 1995 -9.47297280384476 1996 -9.65382160423525 1997 -8.25646737838075 1998 -18.8965094304201 1999 -17.5517202538141 2000 -0.859188245453757 2001 2.02876059123165 2002 -15.2782818738189 2003 -15.8708902266555 2004 -13.3139760453561 2005 -14.2720366453486 2006 -0.800365452247165 2007 49.1508241448793 2008 24.6999411772068 2009 21.1280209258958 2010 13.5987033954519 2011 14.7346904294064 2012 15.8706774633609