Year	Percent
1969	1.01667
1970	-24.43922
1971	10.54626
1972	1.07711
1973	11.39226
1974	150.35485
1975	12.06113
1976	16.55353
1977	8.08138
1978	10.08619
1979	23.09867
1980	37.81417
1981	11.71119
1982	6.31199
1983	1.19666
1984	-0.92283
1985	-1.03887
1986	-26.87015
1987	6.74144
1988	-8.94865
1989	8.57777
1990	7.1016
1991	-2.26251
1992	-0.29663
1993	-1.66431
1994	1.09495
1995	5.81822
1996	7.84293
1997	3.45972
1998	-13.93374
1999	14.48833
2000	10.94798
2001	-1.64668
2002	5.95687
2003	2.31656
2004	11.05643
2005	20.14964
2006	11.57239
2007	8.43538
2008	17.68983
2009	-15.71323
2010	17.19129
2011	15.52939
2012	4.01552
2013	-1.21633
2014	-2.27
2015	-16.90853
2016	-3.04643
2017	6.8159