Year	Percent
2000	92.27902
2001	92.16898
2002	92.05894
2003	91.94889
2004	91.83883
2005	91.72876
2006	91.61868
2007	91.5086
2008	91.39851
2009	91.28841
2010	91.17831
2011	91.06819
2012	90.95807
2013	90.84795
2014	90.73781
2015	90.62767
2016	90.51752
2017	90.40736
2018	90.29719
2019	90.18702
2020	90.07684
2021	89.96665
2022	89.96665