Year	Percent
1993	1.15351
1994	1.9387
1995	3.15191
1996	9.53573
1997	5.05545
1998	13.28037
1999	13.17295
2000	9.109
2001	8.41074
2002	9.34725
2003	10.27774
2004	11.3569
2005	7.31948
2006	6.73292
2007	6.66585
2008	11.98161
2009	17.40519
2010	29.73864
2011	24.584
2012	29.15351
2013	46.3737
2014	31.68476
2015	38.68878
2016	34.081