Year % 2001 15.092 2002 13.713 2003 13.256 2004 11.387 2005 17.278 2006 13.724 2007 22.118 2008 17.88 2009 22.523 2010 23.646 2011 31.238 2012 36.471 2013 34.176 2014 31.797 2015 34.013 2016 33.673 2017 35.052 2018 37.267 2019 36.505 2020 39.883 2021 39.822 2022 35.931 2023 35.549