Year	Percent
1961	-5.53258
1962	13.22534
1963	3.06806
1964	3.37471
1965	-15.2117
1966	9.99179
1967	0.2282
1968	-2.70734
1969	7.69781
1970	14.8908
1971	7.80707
1972	7.40652
1973	9.9056
1974	3.25576
1975	2.52842
1976	4.08478
1977	2.43783
1978	-0.28504
1979	2.09278
1980	5.49057
1981	1.9232
1982	-0.56367
1983	2.33775
1984	-0.92653
1985	-4.19332
1986	1.37102
1987	7.86961
1988	0.10359
1989	2.33088
1990	-7.30623
1991	-1.01222
1992	9.09245
1993	5.34862
1994	0.72666
1995	3.81915
1996	4.17363
1997	7.09317
1998	5.00498
1999	4.27176
2000	3.02986
2001	0.87495
2002	2.89603
2003	-2.83607
2004	1.04631
2005	7.83414
2006	7.61594
2007	5.91265
2008	1.79396
2009	-0.41014
2010	6.91423
2011	1.80547
2012	1.42411
2013	3.5864
2014	6.34773
2015	5.78751
2016	5.40683
2017	3.40398