Year % change from 1990 1991 -14.0890144656524 1992 28.3893730177089 1993 -11.3981189304027 1994 -9.05017855306723 1995 -3.54232702353635 1996 -20.0515354631319 1997 -22.3793453043703 1998 60.8957672199846 1999 29.1434876708507 2000 22.3991353551451 2001 8.35617603223311 2002 17.2318385858665 2003 32.697534491576 2004 31.2983992137744 2005 38.5814734397041 2006 18.2714193925672 2007 28.8624509478615 2008 21.5464677981264 2009 10.8925473725055 2010 23.0322979615702 2011 36.6382608796599 2012 36.9412142167843