Year	Percent
2001	88.84645
2002	88.80341
2003	88.76078
2004	88.71857
2005	88.67685
2006	88.55952
2007	88.44165
2008	88.32308
2009	88.15836
2010	87.89319
2011	87.63267
2012	87.37708
2013	87.12642
2014	86.88042
2015	86.63897
2016	86.40191
2017	86.16913
2018	85.94039
2019	85.71566
2020	85.49472
2021	85.27744
2022	85.06374