Year	annual %
1961	-1.7114073824561586
1962	1.809797963543474
1963	10.853906653435857
1964	-7.983771990294372
1965	8.190190933978457
1966	-7.025517482383691
1967	-8.08973353180184
1968	9.460171782904084
1969	0.9075072745610555
1970	2.575970201604761
1971	1.7767630807776555
1972	0.15049051254163714
1973	-3.050967304618368
1974	3.2654778791535506
1975	2.119580576043134
1976	4.033282986642234
1977	3.8932402854629657
1978	4.429521014780008
1979	3.1621820890762535
1980	5.861412362439907
1981	4.346765326333298
1982	3.6813602204498466
1983	2.382274472365225
1984	2.798149979935289
1985	0.8398224010289113
1986	-2.8778644250865
1987	-5.664820722843416
1988	-12.800921157137054
1989	2.064221759123953
1990	1.252524144696892
1991	-2.069477487178858
1992	8.179005232149407
1993	4.642523392219616
1994	6.084744289506318
1995	5.593555751533913
1996	5.111223231675481
1997	4.333277383512453
1998	4.572168406215198
1999	9.65085573523281
2000	12.505280180006451
2001	10.191004629223002
2002	10.903808097068833
2003	12.766646469966773
2004	12.571110934462553
2005	12.650334204361727
2006	12.220644913694926
2007	11.165298782875126
2008	9.613091444172909
2009	9.904177102127093
2010	8.801704961507141
2011	4.735770714812659
2012	6.427164181540164
2013	7.505154627288007
2014	7.271671975063924
2015	6.137642786154345
2016	5.029320537779142
2017	5.332314339038334
2018	5.50679808737398
2019	5.827195843987482
2020	-9.700371225785787
2021	-12.629476663084546
2022	3.305454134459268
2023	0.2644193385255278