Year	annual %
1961	1.61850343149821
1962	1.34744606186911
1963	1.34164715222231
1964	1.5218170405795
1965	1.65673059371627
1966	1.61488304698856
1967	1.63954192930746
1968	1.67535602338451
1969	1.71523192424371
1970	1.20850689979081
1971	0.389833886326277
1972	-0.114317506115861
1973	-0.359250297337286
1974	-0.380787056424964
1975	-0.285373635225843
1976	-0.0702987726666229
1977	0.198271822156338
1978	0.330100108227101
1979	0.434317951482714
1980	0.432439784927824
1981	0.28776998276152
1982	0.237899841303379
1983	0.270975908122697
1984	-0.0703525302398196
1985	-0.481559093324989
1986	-0.517880318988492
1987	-0.556310271357652
1988	-0.578175920060177
1989	-0.542244585848004
1990	-0.485177852283798
1991	0.4820349277923
1992	1.59793879677082
1993	1.80091155382854
1994	1.86302470544504
1995	1.95769151764103
1996	2.02617716277517
1997	2.01402393932023
1998	1.88335770520301
1999	1.7064071466556
2000	1.65779341376666
2001	1.53371156016655
2002	1.27763943800851
2003	1.13352150752522
2004	1.10308348343215
2005	1.16870545018922
2006	1.27642249519442
2007	1.37623327243605
2008	1.49457906187611
2009	1.5293679498773
2010	1.3640660545341
2011	1.19938337496143
2012	1.0837075607137
2013	0.934326293295174
2014	0.831589247616481
2015	0.786935419380774
2016	0.690288328652049
2017	0.6109561448905
2018	0.554872965946274
2019	0.534443400511753
2020	0.592053942582792
2021	0.597151594527623
2022	0.581875832853236
2023	0.568965860290507