Year	annual %
1968	2.2281541040273254
1969	-1.2241097551175812
1970	4.553193455375592
1971	1.0210571547043799
1972	4.188441770411714
1973	-3.105337231832152
1974	-3.2378872668554095
1975	9.6550459838288
1976	11.614646518461086
1977	4.390638805748466
1978	-3.3804764145267114
1979	8.175842960233098
1980	-6.33081602165872
1981	-0.6510827898001708
1982	-9.345890196645485
1983	-0.3491148923895082
1984	-2.350225029567582
1985	17.972002830944447
1986	0.8821719860052895
1987	-1.785861395489576
1988	5.605868651048681
1989	2.3174664565902106
1990	-4.365187974871745
1991	9.553611296469171
1992	-5.158359420133209
1993	1.0456939729606631
1994	1.5862441168481354
1995	-1.2080237765276536
1996	4.82830281273128
1997	2.52794282915292
1998	4.926313008948597
1999	2.829985285851947
2000	-2.9250502296793286
2001	11.942758131314775
2002	-0.07535326182002677
2003	5.675366396076626
2004	-1.70398742564592
2005	3.070878164541085
2006	1.2589378863774527
2007	0.13197525017505995
2008	1.3875041933100363
2009	1.4492174955695702
2010	1.9465192312595434
2011	-0.07219346320114539
2012	-3.6886137120456226
2013	-0.6488028783053039
2014	3.7426387095772498
2015	2.8828606071254796
2016	2.52844829516809
2017	1.972295116333484
2018	1.4731767251285248
2019	1.531457069041494
2020	-4.290965960110427
2021	-0.15090208004548344
2022	0.3212441297178401
2023	2.0736203270941473