Year	Percent
2000	91.74035
2001	91.73905
2002	91.73775
2003	91.73645
2004	91.73515
2005	91.73384
2006	91.73254
2007	91.73124
2008	91.72994
2009	91.72864
2010	91.72733
2011	91.72603
2012	91.3433
2013	90.96059
2014	90.57788
2015	90.19519
2016	89.8125
2017	89.42983
2018	89.04716
2019	88.66451
2020	88.28187
2021	87.89924
2022	87.89924