Year % 2003 9.51 2004 10.44 2006 8.92 2007 9.07 2008 9.97 2009 12.15 2010 11.28 2011 19.88 2012 11.75 2013 12.02 2015 11.12 2017 16.05 2018 16.34 2019 23.97 2020 16.62 2021 8.35