Year	Percent
2000	91.05403
2001	90.92727
2002	90.79979
2003	90.67158
2004	90.54265
2005	90.41301
2006	90.28264
2007	90.15155
2008	90.01974
2009	89.8872
2010	89.75395
2011	89.61998
2012	89.48528
2013	89.34986
2014	89.21373
2015	89.33737
2016	89.46102
2017	89.58467
2018	89.70832
2019	89.83196
2020	89.95561
2021	90.07926
2022	90.20291