Year % change from 1990 1991 -5.4073677865737 1992 2.40982541855308 1993 -2.88644769040319 1994 -2.10936063453725 1995 2.82541908461329 1996 6.25425577671688 1997 9.67272108726231 1998 183.66707750709 1999 223.613841382073 2000 172.832220006481 2001 114.942930374992 2002 177.485783132186 2003 155.171143530863 2004 160.396912716064 2005 197.189384335979 2006 160.301632705887 2007 180.839702194181 2008 160.423058107167 2009 170.476989338268 2010 171.574474324899 2011 173.468482102083 2012 175.320311623818