Year	annual %
1961	1.5583550408936
1962	1.46073837045336
1963	1.41042530862807
1964	1.3017451764171
1965	1.11104064143605
1966	0.875806322615983
1967	0.69669809166994
1968	0.695984736456634
1969	1.02035464910429
1970	1.69452576739121
1971	2.41433910780115
1972	2.99313194082514
1973	3.29937434466257
1974	3.35235974556416
1975	3.32832392258039
1976	3.2740728463574
1977	3.31744868369035
1978	3.398701247718
1979	3.43544752192563
1980	3.50398465508095
1981	3.55442220894389
1982	3.59219488468114
1983	3.61713653303378
1984	3.60987241166769
1985	3.6037510091581
1986	3.56585603514141
1987	3.43867373579781
1988	3.36704277651175
1989	3.37135095008737
1990	3.34514364694209
1991	3.32613717425745
1992	3.24885002280732
1993	3.16154666755438
1994	3.1984325378482
1995	3.28967582614934
1996	3.33013249836537
1997	3.33515378152671
1998	3.27906774761554
1999	3.22644785271891
2000	3.24412146672851
2001	3.28521723299089
2002	3.33513160843876
2003	3.41332121240757
2004	3.50638882370405
2005	3.55765898910381
2006	3.5920133134417
2007	3.63958930439587
2008	3.67090920225351
2009	3.69348247645612
2010	3.73479765843852
2011	3.75879638504539
2012	3.75870252194126
2013	3.73552542857565
2014	3.68442896683492
2015	3.61767751762095
2016	3.58621100683242
2017	3.5509866361995
2018	3.46445698360985
2019	3.39527779197097
2020	3.26834840458456
2021	3.16602986153025
2022	3.09675267067326
2023	3.03099631037773