Year	Percent
1980	0.02555
1981	-0.02309
1982	0
1983	0.04639
1984	0
1985	0.01625
1986	0.00686
1987	-0.00656
1988	-0.24727
1989	0.02742
1990	0.02694
1991	0.03439
1992	0.05946
1993	0.05966
1994	0.42389
1995	0.05789
1996	0.09902
1997	0.12609
1998	0.20893
1999	0.0581
2000	0.09994
2005	0.79028
2006	0.20931
2007	6.47361
2008	3.17322
2009	3.28694
2010	1.48908
2011	6.02504
2012	0.98489
2013	4.03639
2014	3.27233
2015	2.4437
2016	5.18322
2017	1.01117