Year % 1995 27.3 2000 25.7 2003 24.6 2004 25.5 2005 26.3 2006 26.7 2007 26 2008 26 2009 26 2010 25.6 2011 25.6 2012 26.6 2013 26.4 2014 26.1 2015 26.2 2016 25.9 2017 25.9 2018 24.9 2019 24.9 2020 25.2 2021 24.8