Year	Percent
2000	84.97446
2001	84.98032
2002	85.00259
2003	85.02425
2004	84.83125
2005	84.63843
2006	84.44639
2007	84.25554
2008	84.06635
2009	83.87897
2010	83.68751
2011	83.45544
2012	83.21779
2013	82.97382
2014	82.72336
2015	82.91354
2016	83.10351
2017	83.257
2018	83.376
2019	83.37232
2020	83.3681
2021	83.36332
2022	83.35799