Year % 2001 37.448404162967144 2002 43.79949968015509 2003 31.975595023605102 2004 32.3749588697427 2005 29.483599193786837 2006 23.12808058072653 2007 17.806747060543167 2008 21.71003292354574 2009 24.5978078593631 2010 26.21049456714365 2011 25.45918902075215 2012 23.701322391866594 2013 24.80323858872045 2014 23.63392778247489 2015 22.858005817700025 2016 23.36299179508136 2017 26.831438929807483 2018 25.178443420338574 2019 26.323772431678034 2020 31.225794322127786 2021 28.922416094332743 2022 24.587400531013532 2023 22.001557737456597