Year	Percent
1976	0.03091
1977	0.0526
1980	0.21829
1981	-0.01113
1983	-0.10887
1984	-0.01862
1985	0.13202
1990	0.19427
1991	0.21579
1992	0.23777
1993	0.22817
1994	0.22213
1995	0.86471
1996	-0.02173
1997	0.08173
1998	0.07301
1999	0.0276
2000	0.03892
2001	6.91579
2002	0.78846
2003	2.74333
2004	-0.43263
2005	0.57643
2006	0.49184
2007	0.28928
2008	-0.83507
2009	0.07617
2010	0.00701
2011	-0.06191
2012	0.06053
2013	0.5674
2014	0.6853
2015	1.2842
2016	1.99655
2017	1.91038