Year % 2001 35.32011393669187 2002 38.8878430498991 2003 29.77578739777288 2004 24.915791792954302 2005 20.69439934915428 2006 18.465634828898676 2007 24.228726578253355 2008 23.513535376385427 2009 28.666546124566988 2010 26.783357476440205 2011 25.254162417683613 2012 25.067337006361207 2013 21.677871128683933 2014 24.273283160359235 2015 25.091447509041174 2016 29.551996254536867 2017 32.41677099982169 2018 30.796159128042415 2019 26.091362253416488 2020 27.308573441385413 2021 20.780153095504915 2022 20.04578951349319 2023 23.280823411768186