Year % 2000 21.532 2001 22.396 2002 21.699 2003 21.379 2004 22.328 2005 22.313 2006 24.232 2007 25.764 2008 25.684 2009 26.077 2010 27.219 2011 28.313 2012 28.749 2013 21.993 2014 24.789 2015 22.936 2016 24.843 2017 25.491 2018 24.112 2019 28.405 2020 23.21 2021 26.329 2022 29.097