Year % 2001 3.773903278454829 2002 4.971489810666921 2003 3.488758216044334 2004 3.698019826678707 2005 3.945156623485027 2006 3.9640509420300147 2007 4.269111334228392 2008 6.317503448418912 2009 6.695947302749179 2010 5.103705623908529 2011 4.929525064644442 2012 6.540369263519875 2013 9.800602844088207 2014 6.993346575545662 2015 5.532865667973379 2016 12.59637793585536 2017 8.95048637131628 2018 6.666974741222696 2019 6.583366357012078 2020 12.106187754545179 2021 9.609605588944635 2022 7.841695578662517 2023 5.063962798658648