Year	Percent
1961	-2.0413
1962	0.46962
1963	-2.34774
1964	6.14401
1965	2.70414
1966	-3.72997
1967	0.57656
1968	3.86621
1969	5.08033
1970	-12.05314
1971	6.16325
1972	13.45357
1973	20.45066
1974	12.85376
1975	11.93375
1976	-1.66791
1977	8.51
1978	2.48123
1979	15.18073
1980	12.74093
1981	6.59908
1982	3.85876
1983	-10.5015
1984	-16.59475
1985	-17.01666
1986	8.02588
1987	7.18936
1988	7.78512
1989	0.79293
1990	-0.92043
1991	-6.7773
1992	-14.12966
1993	-3.79112
1994	-3.89567
1995	3.03854
1996	8.98438
1997	-2.87905
1998	-27.04865
1999	8.00681
2000	0.6279
2001	-0.13089
2002	2.71295
2003	8.80128
2004	7.61152
2005	5.1366
2006	-2.01768
2007	0.89489
2008	1.34922
2009	74.29818
2010	4.48786
2011	3.33187
2012	2.56318
2013	2.8057
2014	0.70092
2015	0.89807
2016	1.30998
2017	3.79783