Year	Percent
1961	-1.71852
1962	-5.50956
1963	0.04444
1964	8.71085
1965	13.03141
1966	-8.46732
1967	4.62685
1968	-1.8625
1969	-3.56359
1970	1.40747
1971	-3.41408
1972	5.4916
1973	-4.37442
1974	2.75787
1975	-5.61723
1976	2.62038
1977	-7.7696
1978	-2.80593
1979	-6.26633
1980	-0.41943
1981	2.59704
1982	-6.07259
1983	-5.21114
1984	-3.54946
1985	-1.54697
1986	-2.30238
1987	-0.31368
1988	3.28274
1989	-3.73087
1990	-3.12728
1991	-2.61391
1992	-4.20202
1993	4.12532
1994	-10.95642
1995	0.184
1996	3.31016
1997	0.88993
1998	-3.2254
1999	1.69159
2000	1.02142
2001	2.46696
2002	1.72163
2003	4.1213
2004	4.20634
2005	4.38471
2006	5.01698
2007	5.43606
2008	4.83669
2009	6.18555
2010	7.16355
2011	2.49552
2012	4.41227
2013	1.91677
2014	1.56075
2015	-0.14595
2016	0.68785
2017	1.01581