Year % change from 1990 1991 -7.26585006487365 1992 -2.38090002125801 1993 -1.0973544740835 1994 4.25453932370123 1995 9.01927150910065 1996 11.6582001040911 1997 9.56611615684033 1998 19.7567787478284 1999 16.7176126492644 2000 13.7172974439044 2001 5.99110094634911 2002 11.8341286770905 2003 17.5327483708281 2004 24.654923434419 2005 30.0442020539661 2006 38.4528548076148 2007 41.8277512663192 2008 47.1847763141498 2009 46.0522361254664 2010 39.1140530278041 2011 40.5051935580821 2012 41.8963340883601