Year % 2003 26.62317 2004 26.5803 2006 25.79344 2007 25.77669 2008 41.48989 2009 24.2849 2010 23.14945 2011 38.94582 2012 22.24223 2013 38.52477 2015 19.06365 2017 38.97741 2018 22.12493 2019 21.13864 2020 20.296 2021 5.405877