Year	annual %
1971	25.7794794578665
1972	1.9711053729972718
1973	17.27470808303218
1974	173.1950166103286
1975	4.245870862380215
1976	3.2911074849833994
1977	9.732862123105306
1978	-1.953527766916224
1979	40.82343269279477
1980	40.435384862205865
1981	11.309103344932353
1982	0.7667187039230186
1983	-9.276339973640447
1984	0.34768520546528237
1985	4.867042728053789
1986	-25.701234889076417
1987	10.782485883889436
1988	2.969340167758844
1989	-1.7218671622492963
1990	0.7174145235236296
1991	-0.0330465774615476
1992	1.8340066221673936
1993	-7.3864207794696455
1994	-5.870476027379183
1995	4.850505955202891
1996	15.51023739529873
1997	-4.71535484673295
1998	-17.156112460197562
1999	18.089357387324114
2000	20.521710179026044
2001	-7.7187107750577155
2002	5.148289824627355
2003	4.920650193749495
2004	11.371267931134227
2005	21.771011788769385
2006	16.176362845409713
2007	4.307362206735917
2008	18.662942733791283
2009	-17.16653744550733
2010	11.103350581383935
2011	17.227662916135515
2012	7.4868920299966675
2013	0.22325403107628006
2014	-6.757964914599299
2015	-25.958331468220834
2016	-6.837843509931204
2017	16.230876500559873
2018	11.277971428954771
2019	-0.46766079957033924
2020	-17.460579583505833
2021	27.725053058667598
2022	23.339736825468478
2023	-9.21294274233108