Year	%
1971	20.06938633310711
1972	7.701926990844487
1973	-1.0923770578083674
1974	-5.643527170037734
1975	-1.6409056581706754
1976	-7.490083755427139
1977	-5.902336361755171
1978	6.712201812610408
1979	4.128561072617617
1980	0.9425892377319505
1981	1.4105060836263668
1982	2.6054124141549577
1983	3.572394450994334
1984	3.835120318781025
1985	5.257537651559044
1986	4.864495046355823
1987	8.157389636697983
1988	8.026232318885592
1989	6.8152119347950215
1990	7.332797066355647
1991	5.745512648025256
1992	1.8253291877324263
1993	3.41347240700281
1994	16.428109891843736
1995	15.801648336515806
1996	-5.776588540116965
1997	16.879568494899498
1998	21.096326025913257
1999	17.454048783367263
2000	15.327433446586705
2001	17.812500968169118
2002	17.358140644542736
2003	9.77051092711813
2004	5.045257596654866
2005	7.609987545881699
2006	-8.00986697136364
2007	4.819090788185103
2008	-0.9849969722943327
2009	-10.09600356554835
2010	12.526958492458025
2011	4.526185832268983
2012	9.313511344582883
2013	9.293946359699536
2014	8.249078992173242
2015	6.2688057827038435
2016	10.118128713498676
2017	5.656747615859067
2018	8.48796047494691
2019	7.831100747673967
2020	6.714634409067403
2021	7.427581005143718
2022	5.968446875035436
2023	6.546517061019455