Year	Percent
1988	1.81005
1991	0.58982
1994	1.79871
1995	4.99287
1996	5.28802
1997	2.01866
1998	0.59203
1999	0.66554
2000	0.60163
2001	0.62321
2002	0.65761
2003	1.01387
2004	0.02654
2005	0.09347
2007	0.058
2008	0.03961
2009	0.07654
2010	0.04843
2011	0.17988
2012	0.1767
2013	0.2169
2014	0.15437
2015	0.41195
2016	0.03303