Year	Percent
2000	98.44989
2001	98.46235
2002	98.47481
2003	98.48727
2004	98.49973
2005	98.51219
2006	98.52464
2007	98.5371
2008	98.54956
2009	98.56202
2010	98.57448
2011	98.58694
2012	98.5994
2013	98.61185
2014	98.61185
2015	98.61185
2016	98.61185
2017	98.61185