Year	Percent
1961	-15.72629
1962	-21.6451
1963	31.00795
1964	3.16386
1965	3.42297
1966	-7.39612
1967	6.38818
1968	7.65084
1969	5.36643
1970	5.82801
1971	-13.76223
1972	23.96859
1973	1.00618
1974	4.566
1975	2.14097
1976	5.3531
1977	2.28386
1978	6.08368
1979	4.33592
1980	-2.21655
1981	-0.12946
1982	3.13165
1983	2.15986
1984	2.3898
1985	0.61163
1986	-2.51752
1987	-3.50914
1988	-3.71175
1989	1.64642
1990	-1.74679
1991	-3.58853
1992	-0.54739
1993	-4.23219
1994	-2.91257
1995	1.85342
1996	2.30509
1997	-0.50825
1998	3.54479
1999	1.75801
2000	2.42788
2001	1.67648
2002	4.27945
2003	5.85052
2004	2.94323
2005	4.45275
2006	0.21097
2007	1.7992
2008	0.71395
2009	-0.1016
2010	1.76368
2011	0.93036
2012	1.32111
2013	0.69635
2014	1.73328
2015	1.79025
2016	1.4314
2017	-0.05273