Year	annual %
1961	-4.11875644872696
1962	3.8297230368173
1963	-5.5310798243809
1964	5.046294100286
1965	-8.6802152733344
1966	5.01204964505834
1967	-3.3353376221694
1968	-1.76021775860771
1969	7.47354810115466
1970	5.7554679780979
1971	-0.521678271511533
1972	1.26436212504169
1973	0.96633138955707
1974	-2.71812560617872
1975	2.63331346294339
1976	-3.97966345156419
1977	-1.35267825492055
1978	2.37939305579138
1979	4.18891806107833
1980	7.88469678258042
1981	2.06452272924145
1982	-10.2595022616057
1983	-12.9643464150947
1984	-1.69718077348399
1985	1.82649389645584
1986	10.2749918749492
1987	15.0851827538892
1988	-1.0173191123737
1989	0.104990476051213
1990	-4.25589707880459
1991	4.29856647073161
1992	13.5645968444087
1993	5.02097133690016
1994	8.08651602373622
1995	-4.365723494967
1996	7.50001106096394
1997	5.11968539818972
1998	4.88008764835132
1999	-0.906395948895849
2000	-2.84158712909979
2001	-4.23286000377195
2002	-9.52859863057276
2003	-3.93795064180256
2004	4.00192526282885
2005	5.87189307695388
2006	6.33752215135281
2007	6.88864975917667
2008	8.81863055117127
2009	2.00868479241795
2010	9.08910915896328
2011	6.84840165398855
2012	4.61778482590933
2013	5.20186619222116
2014	2.63367798722123
2015	-0.822991140024996
2016	-0.262395163639525
2017	4.2399445463987
2018	1.14378525294754