Year	Percent
1975	72.1694
2001	96.69421
2002	102.52404
2003	100.36675
2004	95.39801
2005	95.36341
2006	93.6409
2010	99.87578
2011	90.70632
2012	87.79285
2013	88.94349
2014	79.31034
2015	81.19552