Year % 2001 0.96 2004 9.99 2005 9.91 2006 9.47 2007 9.02 2008 9.18 2009 9.24 2010 9.28 2011 8.75 2012 8.31 2013 2.99 2014 3.66 2015 3.86 2016 3.38 2017 2.53 2018 6.34 2019 6.34 2020 6.34 2021 6.34