Year	Percent
2000	56.31021
2001	57.06643
2002	57.80702
2003	58.53158
2004	59.24065
2005	59.93299
2006	60.60962
2007	61.27062
2008	61.91609
2009	62.54573
2010	63.16005
2011	63.75878
2012	64.34202
2013	64.90955
2014	65.46151
2015	65.99805
2016	66.51932
2017	67.02481
2018	67.51536
2019	67.99048
2020	68.4507
2021	68.89556
2022	69.59255