Year	Percent
1961	0.46656
1962	-1.14588
1963	4.19669
1964	4.89989
1965	3.92669
1966	0.07139
1967	4.96899
1968	3.25807
1969	4.82698
1970	5.08135
1971	0.54705
1972	2.02007
1973	1.05697
1974	1.50059
1975	0.11018
1976	1.56448
1977	2.43672
1978	-0.26975
1979	2.92523
1980	1.7859
1981	1.71098
1982	1.61937
1983	-3.43531
1984	3.40373
1985	3.81988
1986	2.36358
1987	0.95803
1988	3.96596
1989	2.12436
1990	2.0431
1991	-1.64913
1992	-0.76878
1993	3.02619
1994	2.88372
1995	2.58263
1996	2.52278
1997	2.8098
1998	3.49246
1999	3.82506
2000	2.71126
2001	0.56791
2002	2.74131
2003	1.72271
2004	2.80233
2005	1.83737
2006	1.32833
2007	3.13108
2008	1.60112
2009	-0.15645
2010	0.4778
2011	1.03736
2012	2.05347
2013	0.85051
2014	0.9952
2015	0.86357
2016	1.29822
2017	0.34888