Year	Percent
1994	2.08177
1995	7.87974
1996	8.19415
1997	11.73754
1998	23.10093
1999	32.31112
2000	22.49164
2001	18.8818
2002	25.08771
2003	12.67108
2004	18.36743
2005	13.63053
2006	17.72008
2007	14.13285
2008	16.5648
2009	16.92311
2010	14.50824
2011	12.69877
2012	15.26975
2013	16.06158
2014	14.57649
2015	12.94179
2016	13.00288