Year	Percent
1989	0.05069
1990	11.58914
1991	0.78509
1992	9.54308
1993	0.90347
1994	0.95036
2000	0.33388
2001	2.46688
2002	1.40718
2003	1.21985
2004	1.13017
2005	3.114
2006	2.42716
2007	4.40508
2008	3.08046
2009	4.47875
2010	3.39718
2011	3.53758
2012	2.05307
2013	2.21539
2014	2.07843
2015	2.29261
2016	2.25194