Year	annual %
1971	0
1972	-5.400124791776761E-13
1973	54.252827000000224
1974	138.26349256389162
1975	19.000916000000018
1976	11.774331354963692
1977	5.2557560912577515
1978	-3.661111495439755
1979	7.051020544493468
1980	9.515976034750821
1981	7.054483982354327
1982	1.3128687287721874
1983	-3.618017218523377
1984	-6.097467186338676
1985	0.7405328899001944
1986	-1.6984852974197366
1987	3.685584802616873
1988	2.3810457316534723
1989	1.751276609360275
1990	3.3359004939926393
1991	0.8108487228679024
1992	1.806826123236931
1993	1.278036311158644
1994	-0.2624749250144731
1995	3.9074797579720837
1996	5.773043898666046
1997	-0.9523007134942532
1998	-4.2544453145585805
1999	8.44337746020058
2000	11.459535793989389
2001	-2.34930767820795
2002	3.770839548260426
2003	4.072406797330075
2004	8.501422058852938
2005	16.526306932784493
2006	11.962149286584605
2007	12.533960671494569
2008	18.533353084924585
2009	-15.182979886533886
2010	16.527886364070213
2011	13.167219372619826
2012	4.679725125549055
2013	-0.9493253248774209
2014	-0.6680493556906271
2015	-16.267006025706948
2016	-5.529478612645775
2017	4.986213144017199
2018	7.936748033198256
2019	-3.1944094044690274
2020	-12.031305301211091
2021	13.843770340967538
2022	13.241537180713394
2023	-3.8430935524466463