Year	Percent
2000	77.32154
2001	77.86122
2002	78.4009
2003	78.88311
2004	79.23366
2005	79.58165
2006	79.92707
2007	80.26993
2008	80.61023
2009	80.94796
2010	81.28313
2011	81.61574
2012	81.94579
2013	82.27327
2014	82.59819
2015	82.92055
2016	83.44445
2017	83.96836
2018	84.49226
2019	85.01617
2020	85.54007
2021	86.06398
2022	86.06398