Year	Percent
1986	0.00483
1991	0.46742
1992	0.15179
1993	1.00208
1994	0.74529
1995	0.67485
1996	1.18152
1997	2.11697
1998	1.68084
1999	2.87495
2000	4.72339
2001	3.39117
2002	5.57042
2003	8.24298
2004	4.6635
2005	7.435
2006	7.18969
2007	8.80189
2008	15.02162
2009	13.60448
2010	23.52634
2011	43.91211
2012	34.75598
2013	16.37008
2014	2.76259
2015	0.80275
2016	-37.16565
2017	13.00787