Year	annual %
1961	2.97752227586077
1962	3.15116373120966
1963	3.28525797341162
1964	3.38318215313117
1965	3.37026778402494
1966	3.34550088710455
1967	1.34293232967401
1968	-2.64665731881634
1969	-4.7871046457669
1970	1.90102763970351
1971	10.6158777263921
1972	12.1018822911535
1973	10.1787762335515
1974	5.5947552225204
1975	2.412790207134
1976	2.1125720858392
1977	1.94316502704934
1978	1.82588029336628
1979	1.83558751472411
1980	6.56405873389949
1981	12.2182963442812
1982	12.9207163632627
1983	12.2330556189807
1984	11.5757942944301
1985	10.8900440739668
1986	10.1360766759417
1987	9.32082360806009
1988	8.51148130582458
1989	7.88713230993936
1990	4.56712050094959
1991	0.623029096221364
1992	-0.360883934136508
1993	-0.374703798252124
1994	-0.350994844718984
1995	1.94209032533967
1996	9.11645322601822
1997	13.067677774177
1998	11.8978988548756
1999	10.6998565447095
2000	5.23958252727563
2001	-1.07498985987344
2002	-2.95857279553887
2003	-3.34583371838907
2004	-3.72003227551706
2005	-4.07796901122163
2006	-4.39053378535746
2007	-4.66353575517151
2008	-4.90503090271691
2009	-5.08445117030295
2010	-5.34393804525569
2011	-2.93998117935774
2012	-0.307020712378622
2013	-0.417225485626769
2014	-0.548094105534998
2015	-0.661703101237154
2016	-0.742353404784604
2017	-0.793234215651641
2018	-0.841314237571621
2019	-0.890563183033054
2020	-0.545026237308475
2021	-0.213994509732827
2022	0.141368470106524
2023	0.493221731247645