Year	Percent
2000	59.88661
2001	60.41117
2002	60.93572
2003	61.46028
2004	61.98484
2005	62.5094
2006	63.03395
2007	63.55851
2008	64.08307
2009	64.60762
2010	65.13218
2011	65.65674
2012	66.18129
2013	66.70585
2014	67.23041
2015	67.75496
2016	68.27952
2017	68.80408
2018	69.32864
2019	69.85319
2020	70.37775
2021	70.90231
2022	71.42686