Year	Percent
2000	59.99835
2001	60.06955
2002	60.14076
2003	60.21197
2004	61.10424
2005	61.99845
2006	62.89459
2007	63.79268
2008	64.69271
2009	65.59468
2010	66.49858
2011	67.40443
2012	68.31221
2013	69.22194
2014	70.13361
2015	71.04721
2016	71.96276
2017	72.88024
2018	73.79966
2019	74.72103
2020	75.64433
2021	75.73203
2022	75.81972