Year	%
1964	3.260474651639514
1965	1.9020901442898694
1966	-0.9528714234307684
1967	0.8148270293440661
1968	1.4376882012785452
1969	6.355237351898957
1970	6.9123314629346915
1971	-11.132298616530772
1972	5.617312436154409
1973	-12.667471206820792
1974	-24.37065581307167
1975	14.349193783471923
1976	1.284760433239259
1977	-0.8276474362912227
1978	11.993712387981686
1979	-15.485247977005162
1980	-19.670976535629986
1981	-2.6475942349571335
1982	18.5200896225699
1983	6.11371641015832
1984	14.443483300491545
1985	8.357253912246913
1986	16.099887092650718
1987	-11.501460243049202
1988	30.13116069961512
1989	5.879940258840044
1990	2.1942988898690197
1991	12.78274808417898
1992	-2.0120594497312148
1993	5.279581631182361
1999	-17.678604268188078
2000	-5.566178581093222
2001	-0.17248203827286573
2002	-15.911773635880264
2003	-6.437915462459978
2004	-13.475766084562997
2005	-17.45645574105303
2006	-11.151599276255505
2007	3.475825036549856
2008	-14.315303102778477
2009	41.04610281324958
2010	-11.13238370300516
2011	-14.751767076754145
2012	0.01704960099546749
2013	5.909561344881549
2014	7.0778499384252305