Year Percent 2000 92.41344 2001 92.68899 2002 92.96899 2003 93.25367 2004 93.54317 2005 93.83782 2006 94.13754 2007 94.44258 2008 94.75303 2009 95.06909 2010 95.39078 2011 95.72518 2012 96.06463 2013 96.40752 2014 96.75388 2015 97.10371 2016 97.45533 2017 97.79091 2018 98.12522 2019 98.42052 2020 98.71312 2021 99.00732 2022 99.01563