Year % change from 1990 1991 -1.36191707752727 1992 3.80129297783489 1993 10.6953504937531 1994 -9.03583480034301 1995 -3.75504029291478 1996 -1.85506871818509 1997 -1.88935041520127 1998 -23.1360995859994 1999 -72.635389444219 2000 -73.6772723122313 2001 -70.8633725169768 2002 -69.6066524227008 2003 -65.3969392620672 2004 -70.3331104552967 2005 -70.6172801013207 2006 -72.225326044053 2007 -70.4858484058841 2008 -69.4490899859232 2009 53.9467203387682 2010 -64.5226728656383 2011 -63.8935639097113 2012 -63.307331132284