Year % 2000 44.99130110374594 2001 44.95632405394549 2002 44.87887663022675 2003 44.42023993356256 2004 44.32345538501515 2005 44.8295716576557 2006 45.35384411902454 2007 45.03385755121826 2008 44.8502471272978 2009 44.88060508609879 2010 44.82027853769224 2011 45.73003283465929 2012 46.48238638702862 2013 45.7316435432899 2014 45.90271869640773 2015 46.14235240738457 2016 46.152767888546805 2017 46.259447407363304 2018 46.3398964734464 2019 46.41776291845416 2020 46.44147001234043 2021 46.53544108715699