Year Percent 2000 92.21546 2001 92.25284 2002 92.29022 2003 92.3276 2004 92.36498 2005 92.56822 2006 92.7716 2007 92.97512 2008 93.17877 2009 93.38255 2010 93.58647 2011 93.79052 2012 93.9947 2013 94.19902 2014 94.40347 2015 94.60806 2016 94.81278 2017 95.01764 2018 95.22263 2019 95.42776 2020 95.63301 2021 95.83841 2022 96.04393