Year % 2001 16.676306455881587 2002 15.954626658791131 2003 18.84814613856725 2004 23.427916275111464 2005 18.20320039138793 2006 20.013334167839837 2007 19.586807429132723 2008 16.867848333980138 2009 24.483869868437196 2010 29.712289796780706 2011 32.26404571153683 2012 26.28757221604581 2013 22.423011103442168 2014 21.926251481240044 2015 20.958836384919135 2016 23.002486357659286 2017 24.303323252219485 2018 22.714602636454547 2019 23.834866626662112 2020 28.333493731946987 2021 27.514758213400125 2022 31.003965237965865 2023 34.15766520060696