Year Percent 2000 90.04467 2001 90.29626 2002 90.54819 2003 90.80047 2004 91.0531 2005 91.30608 2006 91.5594 2007 91.81307 2008 92.06708 2009 92.32145 2010 92.57616 2011 92.83121 2012 93.08662 2013 93.34237 2014 93.45694 2015 93.57151 2016 93.68607 2017 93.80064 2018 93.91521 2019 93.91521 2020 93.91521 2021 93.91521 2022 93.91521