Year % 2000 24.737 2001 25.641 2002 27.664 2003 28.181 2004 29.713 2005 31.042 2006 30.658 2007 33.872 2008 31.884 2009 35.129 2010 35.56 2011 30.911 2012 33.301 2013 32.228 2014 31.071 2015 34.338 2016 34.013 2017 35.861 2018 33.056 2019 32.385 2020 32.434 2021 30.661 2022 32.465