Year	Percent
2000	91.24126
2001	91.10022
2002	90.95861
2003	90.81643
2004	90.67369
2005	90.53038
2006	90.3865
2007	90.24205
2008	90.09704
2009	89.95146
2010	89.80531
2011	89.6586
2012	89.51132
2013	89.36347
2014	89.21505
2015	89.06607
2016	88.91652
2017	88.7664
2018	88.61571
2019	88.46446
2020	88.31264
2021	88.16025
2022	88.25951