Year	Percent
2000	82.84719
2001	83.13201
2002	83.42087
2003	83.70987
2004	83.99888
2005	84.28778
2006	84.57683
2007	84.86577
2008	85.15485
2009	85.44394
2010	85.73292
2011	86.02204
2012	86.31118
2013	86.6024
2014	86.89574
2015	87.19113
2016	87.48839
2017	87.78755
2018	88.08866
2019	88.39141
2020	88.69595
2021	89.00221
2022	89.31011