Year	annual %
1967	0.5704437881468749
1968	4.48205933346901
1969	4.28529918296519
1970	10.589016777079635
1971	0.9885688579642533
1972	16.212147818173904
1973	-6.94409664054912
1974	-5.662757540360644
1975	-1.6610061616354983
1976	-7.9076190644236135
1977	-3.8034386215056486
1978	-1.2815041813774286
1979	-2.3022046031896224
1980	-6.977266487884606
1981	1.165649480273487
1982	0.5402854796798096
1983	0.3948528375582896
1984	-2.9040397771896806
1985	-4.1265474653921785
1986	0.8337461795989043
1987	6.909810008514356
1988	3.154801867660069
1989	6.33519620440903
1990	3.3874587787389174
1991	3.9759705841668165
1992	1.0046145357494538
1993	8.327497665843552
1994	0.35820293967864814
1995	1.3225304909808528
1996	-1.0413360780800645
1997	-1.9940335395188242
1998	-3.153799964785776
1999	0.28078806954496827
2000	0.26336085382723695
2001	0.8353879617210964
2002	1.5009216854165572
2003	3.1664484712050154
2004	0.8293960490182855
2005	0.4098824454250831
2006	2.409546701321389
2007	0.9978337552607428
2008	-1.1831202233602482
2009	-4.732783353549181
2010	-1.871482682670461
2011	1.2757294820999903
2012	-1.1051269957288383
2013	0.03516556885534783
2014	0.27708905342210244
2015	0.5638760199495323
2016	1.076815428133287
2017	0.7928182768943941
2018	1.7645830243041587
2019	0.8228015914664155
2020	-10.133126744458991
2021	4.332901289574551
2022	5.233354298616405
2023	2.266361169903334