Year	Percent
1961	1.4569
1962	0.59902
1963	-0.00246
1964	4.37958
1965	2.45082
1966	-7.47427
1967	2.03925
1968	3.39807
1969	2.35162
1970	2.90538
1971	1.57443
1972	27.71122
1973	12.54807
1974	20.93437
1975	13.50724
1976	9.13417
1977	43.80525
1978	-0.45524
1979	17.00997
1980	22.06135
1981	13.14933
1982	0.19985
1983	4.22681
1984	2.93045
1985	1.51365
1986	6.74113
1987	4.14098
1988	3.85939
1989	1.28711
1990	6.82672
1991	-2.04315
1992	4.67956
1993	4.10202
1994	0.96112
1995	-0.77874
1996	-1.53239
1997	1.08376
1998	4.36585
1999	2.05663
2000	3.98373
2001	6.15676
2002	3.61317
2003	5.94683
2004	24.67412
2005	0.45865
2006	1.44234
2007	11.79984
2008	34.96513
2009	27.49418
2010	-4.21272
2011	4.49624
2012	8.65859
2013	4.03664
2014	2.28992
2015	2.08971
2016	-0.79112
2017	2.36391