Year	Percent
2000	63.36669
2001	63.10552
2002	62.84487
2003	62.58475
2004	62.32516
2005	62.06611
2006	61.80758
2007	61.54958
2008	61.29211
2009	61.03517
2010	60.77876
2011	60.52288
2012	60.26753
2013	60.01271
2014	59.75842
2015	59.50466
2016	59.25143
2017	59.10745
2018	59.10745
2019	59.10745
2020	59.10745