Year % 1995 5.18 1996 4.6 1997 5.31 1998 4.73 2000 4.5 2001 3.47 2002 2.72 2003 3.32 2004 1.74 2005 6.54 2006 10.27 2007 9.78 2008 9.59 2009 8.72 2010 7.7 2011 7.57 2012 7.31 2013 7.28 2014 7.03 2015 9.71 2016 8.43 2017 9.5 2018 9.5 2019 10.11 2020 10.13 2021 9.6