Year	Percent
2000	59.96821
2001	61.69976
2002	63.45162
2003	65.22379
2004	67.01626
2005	68.82904
2006	70.66213
2007	72.51553
2008	74.38924
2009	76.28325
2010	78.19757
2011	80.1322
2012	82.08713
2013	84.06238
2014	86.05793
2015	86.05793
2016	86.05793
2017	86.05793
2018	86.05793