Year	Percent
1960	-2.77593
1961	-4.11975
1962	-1.44682
1963	-2.47103
1964	-0.97751
1965	0.6238
1966	0.93571
1967	1.14127
1968	0.60057
1969	2.01588
1970	0.38651
1971	-1.20457
1972	-3.60181
1973	-2.0861
1974	0.22898
1975	-2.45881
1976	3.63474
1977	-2.29394
1978	-3.8384
1979	-3.42011
1980	-4.77747
1981	-10.67367
1982	-2.63897
1983	2.02591
1984	-1.65988
1985	1.91828
1986	2.58663
1987	2.49485
1988	6.49241
1989	4.42712
1990	3.24346
1991	4.50774
1992	1.66953
1993	-1.8477
1994	1.71145
1995	2.28535
1996	-1.47689
1997	-2.00571
1998	-3.2789
1999	2.185
2000	1.74758
2001	1.65413
2002	2.21414
2003	5.0018
2004	9.87108
2005	8.70287
2006	14.49156
2007	13.73059
2008	2.05856
2009	7.74434
2010	6.42651
2011	3.31825
2012	-0.02813
2013	-0.57453
2014	0.94876
2015	-0.21951
2016	0.85441
2017	1.71214