Year % change from 1990 1991 4.65972647479078 1992 16.9944886711566 1993 37.820534803021 1994 17.7405184731578 1995 -11.9740355174525 1996 -5.43637477036212 1997 0.202898550724639 1998 -7.23518269034498 1999 -2.49351296182895 2000 11.3084221269647 2001 9.15868381302225 2002 14.9200857317812 2003 22.8867605633803 2004 24.7306242090223 2005 23.8509597877118 2006 34.8750038783425 2007 46.4261759542764 2008 58.1130981833027 2009 64.2622118799747 2010 78.3639681567675 2011 78.3639681567675 2012 78.3639681567618