Year Percent 1992 -1.3267 1993 -8.84373 1994 -10.05226 1995 -4.57469 1996 -0.73596 1997 -2.52584 1998 -4.51578 1999 2.34504 2000 7.50516 2001 -1.05903 2002 -0.0504 2003 5.37071 2004 8.59162 2005 8.62621 2006 10.49707 2007 6.46401 2008 19.99797 2009 7.91078 2010 14.35009 2011 19.81147 2012 14.49559 2013 11.82647 2014 13.71148 2015 3.98369 2016 3.37618