Year	Percent
2000	92.58207
2001	92.53648
2002	92.4909
2003	92.44531
2004	92.39972
2005	92.37374
2006	92.34775
2007	92.32174
2008	92.2957
2009	92.26965
2010	92.24358
2011	92.21749
2012	92.19138
2013	92.16525
2014	92.1391
2015	92.1391
2016	92.1391
2017	92.1391
2018	92.1391