Year % 1999 0.3 2000 5.42 2001 7.31 2002 7.24 2003 5.3 2004 5.25 2005 5.1 2006 5.09 2007 5.41 2008 5.41 2009 5.41 2010 5.25 2011 5.26 2013 5.24 2015 4.02 2017 7.94 2018 7.44 2019 7.75 2020 7.78 2021 7.35