Year	annual %
1961	0.5033874806986822
1962	0.9042844435401212
1963	1.508513835391095
1964	1.4333991660350296
1965	1.1182085589845325
1966	0.7615787566814162
1967	0.3571509207459546
1968	0.8554006223666888
1969	1.6640302875983102
1970	1.6409133371716071
1971	1.391184466445451
1972	1.1273074391605309
1973	0.8521585443684485
1974	0.6353766113529088
1975	1.0317895654317035
1976	1.4546559640547967
1977	1.3195435036875562
1978	1.178155497132555
1979	1.0527004513430298
1980	0.8977986478081157
1981	0.7652723146111617
1982	1.0536583251609257
1983	1.4831619299240852
1984	1.4966941326149918
1985	1.3982819494766974
1986	1.255665192414918
1987	1.1215198257385353
1988	1.018524200749431
1989	0.9218502156152848
1990	0.8310342991408322
1991	0.771849528449064
1992	0.7497020022406854
1993	0.7441232692568961
1994	0.7354273074409478
1995	0.7300582357924302
1996	0.7499916485869528
1997	0.7819532047643959
1998	0.7510514136093559
1999	0.5727303861968254
2000	0.2189365496245045
2001	-0.06470597523517832
2002	-0.17892955568192542
2003	-0.21637670338168521
2004	-0.2478623155197274
2005	-0.2951366760135911
2006	-0.4052879970897567
2007	-0.5890294938862817
2008	0.12247783583344281
2009	1.6775209368822006
2010	2.369771915055836
2011	2.285456208352701
2012	2.1998119199203225
2013	2.067809862393071
2014	1.9152049712622194
2015	1.7840462198119897
2016	0.8424695302676752
2017	-0.07285974821404986
2018	-0.040500587812128785
2019	0.01350201857229103
2020	-0.3028830267246421
2021	-0.6412368456218757
2022	-0.5932626244593162
2023	-0.4727491420115418