Year	Percent
2000	68.756
2001	69.26978
2002	69.8032
2003	70.33289
2004	70.8544
2005	71.36689
2006	71.87086
2007	72.3663
2008	72.85324
2009	73.33124
2010	73.80078
2011	74.26167
2012	74.71414
2013	75.155
2014	75.58499
2015	76.00423
2016	76.41305
2017	76.81173
2018	77.2006
2019	77.33578
2020	77.31736
2021	77.28513
2022	77.34112