Year Percent 2000 48.74933 2001 50.25852 2002 52.01123 2003 53.8292 2004 55.46575 2005 56.41872 2006 57.37719 2007 58.34115 2008 59.3106 2009 60.28554 2010 61.26597 2011 62.2519 2012 63.24332 2013 64.24023 2014 65.24263 2015 66.25052 2016 67.26391 2017 68.28279 2018 69.30716 2019 70.33702 2020 71.37238 2021 71.37238 2022 71.37238