Year	Percent
1995	80.32176
1996	80.98335
1997	81.50697
1998	82.62664
1999	83.63014
2001	88.62489
2002	88.52596
2003	88.79543
2004	89.15249
2005	89.41141
2006	90.166
2007	90.63128
2008	91.08536
2009	91.16124
2010	91.12975
2015	89.60433
2016	91.33808