Year	Percent
1990	0.56128
1991	0.5013
1992	0.45596
1993	0.48264
1994	0.918
1995	0.9634
1996	0.58961
1997	0.77031
1998	1.21001
1999	1.15375
2000	1.05143
2001	1.24297
2002	2.30483
2003	5.29813
2004	4.51323
2005	1.80696
2006	24.15149
2007	8.24741
2008	7.24479
2009	1.85943
2010	0.69136
2011	0.79634
2012	0.92607
2013	0.56052
2014	0.02327
2015	0.05963
2016	0.06969