Year	Percent
1960	-7.68345
1961	-7.11475
1962	-5.29122
1963	-4.75813
1964	-6.21106
1965	-5.12381
1966	-4.20863
1967	-6.33375
1968	-5.80888
1969	-4.039
1970	-2.80645
1971	-2.79507
1972	-0.82739
1973	0.56809
1974	10.61008
1975	-4.49284
1976	-5.70647
1977	2.34956
1978	-4.20964
1979	5.75387
1980	10.17903
1981	-3.91829
1982	-2.08083
1983	2.03515
1984	7.80198
1985	8.87034
1986	2.9153
1987	12.23705
1988	10.39727
1989	27.57087
1990	17.65828
1991	18.52556
1992	13.98778
1993	9.54988
1994	6.31159
1995	11.75515
1996	6.78614
1997	6.6892
1998	-6.79021
1999	11.89267
2000	32.08019
2001	9.08329
2002	8.54774
2003	4.3569
2004	11.87337
2005	12.56558
2006	21.61335
2007	2.99413
2008	14.79328
2009	-0.26562
2010	7.87685
2011	9.86551
2012	18.49736
2013	5.05095
2014	5.98506
2015	-0.00003
2016	-2.2863