Year % change from 1990 1991 -7.97034840622683 1992 14.8023227081789 1993 -11.5198912774895 1994 -6.13985668396343 1995 -4.27501853224611 1996 -8.90684457622931 1997 -10.6666666666667 1998 -2.0763528539659 1999 -6.68742278230788 2000 -3.42871262663702 2001 -3.98443291326909 2002 -2.20904373610081 2003 0.336298492710663 2004 -1.87892265875957 2005 1.70546083518657 2006 1.92191746973065 2007 2.92710649864096 2008 3.77958981961948 2009 5.34964170990857 2010 12.1455399061033 2011 13.2669953051643 2012 14.3884507042253