Year	Percent
1995	32.94131
1996	40.02164
1997	13.46473
1998	23.13137
1999	45.74575
2000	16.24793
2001	14.33362
2002	15.36689
2003	23.28172
2004	28.5203
2005	28.48446
2006	38.09588
2007	48.97843
2008	19.35615
2009	39.83495
2010	47.72757
2011	43.68649
2012	46.65395
2013	37.99065
2014	47.38663
2015	41.03726
2016	45.67067
2017	51.27195