Year	Percent
1995	4.46463
1996	5.17274
1997	5.45491
1998	7.74026
1999	8.8409
2000	0.9443
2001	3.23861
2002	11.24069
2003	8.72816
2004	8.79618
2005	11.29115
2006	20.85956
2007	21.44793
2008	21.92648
2009	29.94279
2010	34.1586
2011	24.67345
2012	29.97019
2013	36.70116
2014	37.17247
2015	41.19051
2016	30.38996