Year Percent 2000 92.25384 2001 92.53828 2002 92.82294 2003 93.10782 2004 93.39291 2005 93.67822 2006 93.96375 2007 94.2495 2008 94.53546 2009 94.82164 2010 95.10804 2011 95.39465 2012 95.66424 2013 95.89806 2014 95.88747 2015 95.87688 2016 95.86629 2017 95.85571 2018 95.84512 2019 95.83454 2020 95.82396 2021 95.81339 2022 95.80281