Year	Percent
1995	3.8978
1996	4.58947
1997	6.18091
1998	14.43119
1999	19.64417
2000	32.36981
2001	32.33816
2002	34.88683
2003	34.78033
2004	37.98398
2005	41.93259
2006	33.45819
2007	48.85369
2008	41.74552
2009	50.19486
2010	57.86899
2011	35.36042
2012	24.72598
2013	33.16751
2014	34.95995
2015	63.26426
2016	44.30772