Year % change from 1990 1991 -16.7124706515679 1992 -5.68044301627284 1993 -11.1008726659762 1994 -11.139731255175 1995 -2.19541758750871 1996 -3.04150529209707 1997 2.96998280319296 1998 501.571826115938 1999 574.404928093615 2000 604.796680039053 2001 467.813691223521 2002 593.546578611918 2003 622.146200343238 2004 582.295408382724 2005 575.477171042357 2006 596.066879307381 2007 601.245961455072 2008 551.960412007926 2009 456.385296852029 2010 495.095982463379 2011 496.913074461722 2012 498.725573359143