Year % 2002 13.34 2003 13.8 2005 21.1 2006 17.49 2007 12.28 2008 10.72 2009 13.84 2010 8 2011 6.83 2012 6.99 2013 5.39 2014 5.99 2015 6.13 2016 5.91 2018 7.89 2019 8.52 2020 11.31 2021 8.53