Year % 2003 9.9 2004 10.48 2006 8.2 2007 7.97 2008 8.85 2009 11.57 2010 10.07 2011 24.94 2012 10.58 2013 11.29 2015 9.33 2017 25.97 2018 27.33 2019 60.01 2020 36.56 2021 17.99