Year	annual %
1961	4.930457689945285
1962	8.435494794644427
1963	6.6544079882558265
1964	5.785157046068008
1965	6.5273112470211885
1966	-0.2932140497769069
1967	7.438165169001394
1968	-3.5832341434809507
1969	-1.6558973948203572
1970	-2.330079874533581
1971	-1.213912160222435
1972	-1.495134820058425
1973	3.200170736845223
1974	4.0591199607174815
1975	1.9250265790566914
1976	1.4454583511987522
1977	4.535242385510045
1978	-8.694758970520056
1979	-29.060488572760278
1980	14.621278340136882
1981	-16.528457648417913
1982	-15.210639596451543
1983	-8.057294591515358
1984	-7.386199173536582
1985	-10.21950567637711
1986	-10.359306911179516
1987	-5.031523323787184
1988	40.33723113257793
1989	-7.836999008966487
1990	-17.195392790654566
1991	31.42081413515703
1992	4.238462470330106
1993	-5.078126124701825
1994	0.14639366510591856
1995	1.5079228188874367
1996	2.50522518576237
1997	4.007697152250671
1998	3.6458082640203173
1999	1.8687685740477349
2000	4.277149877750304
2001	3.4357557928271802
2002	3.054067499429607
2003	0.4359104908621134
2004	0.7357110905103212
2005	2.0982626097734567
2006	1.454727951083683
2007	3.314360228925821
2008	1.7613359334898178
2009	0.2321224783595568
2010	1.525773307840538
2011	1.1199925990426323
2012	2.555816855018378
2013	2.3241367160062794
2014	2.7349132232276077
2015	3.7473778141575735
2016	4.1971119207830725
2017	1.2525468601657792
2018	-5.890945523017351
2019	-3.1433132358824594
2020	-1.6814557132359198
2021	7.361501470497743
2022	4.459441539575565
2023	5.571048910758066