Year	Percent
2000	52.18433
2001	52.57397
2002	52.96387
2003	53.35401
2004	53.74441
2005	54.13507
2006	54.52597
2007	54.91713
2008	55.30854
2009	55.7002
2010	56.09212
2011	56.48429
2012	56.87671
2013	57.26938
2014	57.66231
2015	58.05549
2016	58.44892
2017	58.8426
2018	59.23654
2019	59.63073
2020	60.02517
2021	60.39948
2022	60.77379