Year % change from 1990 1991 -1.71921566107304 1992 12.0892944644822 1993 10.6931647481263 1994 8.96848666929078 1995 4.93175994280526 1996 6.59619076690741 1997 5.1999003912055 1998 4.98831203258172 1999 8.0363411440552 2000 15.1165985203274 2001 14.7168780675894 2002 14.8931213701029 2003 15.9276068987123 2004 14.9215580743371 2005 14.8585796107224 2006 14.2326507988786 2007 14.5128406982255 2008 13.7044028693759 2009 12.2925285371163 2010 12.5852498654478 2011 13.7111023641023 2012 14.8369548627568