Year	Percent
2000	78.68496
2001	78.73919
2002	78.79454
2003	78.851
2004	78.90859
2005	78.1098
2006	77.15286
2007	76.21346
2008	75.29205
2009	74.3885
2010	73.50322
2011	72.63483
2012	71.78353
2013	70.94907
2014	70.13113
2015	69.32992
2016	68.5448
2017	67.77596
2018	67.00626
2019	67.1538
2020	67.30103
2021	67.44761