Year % 1994 17.35 2000 5.53 2001 5.97 2002 5.73 2003 5.42 2004 6.03 2005 10.12 2006 7.98 2007 9.57 2008 11.44 2009 12.63 2010 11.91 2011 10.68 2012 13.03 2013 12.44 2014 12.5 2015 11.71 2016 9.94 2018 14.31 2019 14.43 2020 13.27 2021 13.33