Year	Percent
2001	74.44028
2002	74.41285
2003	74.46314
2004	74.51304
2005	74.56294
2006	75.45251
2007	76.33912
2008	77.22277
2009	78.10345
2010	78.98116
2011	79.85591
2012	80.69239
2013	81.51375
2014	82.33595
2015	83.16541
2016	84.00183
2017	84.84359
2018	85.69062
2019	86.54158
2020	87.39567
2021	88.25226
2022	88.28423