Year Percent 2000 2.19496 2001 -0.92115 2002 1.24878 2003 4.45451 2004 4.47004 2005 2.1507 2006 17.69964 2007 2.2697 2008 2.40882 2009 1.52774 2010 1.4686 2011 4.30941 2012 10.08359 2013 8.00869 2014 16.23231 2015 11.79979 2016 11.64351 2017 12.16874