Year % 1995 7.49 1996 7.63 1997 7.63 1998 6.52 2000 6.1 2001 5.33 2002 5.61 2003 5.14 2004 3.76 2005 11.37 2006 13.33 2007 12.11 2008 12.13 2009 10.73 2010 10.56 2011 10.93 2012 10.96 2013 10.96 2014 10.69 2015 10.94 2016 10.26 2017 6.91 2018 9.25 2019 8.89 2020 8.27 2021 8.53