Year % change from 1990 1991 -5.06672458253512 1992 -4.46395344234439 1993 -4.96564959333141 1994 -5.86001080253916 1995 -6.41362364083158 1996 -3.0459579136348 1997 -2.49294781792313 1998 1297.00912248073 1999 1241.20443393019 2000 1298.85189472452 2001 939.935358204041 2002 1225.01591379459 2003 1175.29117116284 2004 1128.4865932269 2005 1271.59274337125 2006 882.852656150476 2007 1184.74707826496 2008 1156.62561665496 2009 1107.32415212822 2010 921.814056252393 2011 921.814056252393 2012 921.814056252397