Year	annual %
1961	2.26431201658321
1962	2.29815730619815
1963	2.29624797891927
1964	2.27437711946654
1965	2.29312302663354
1966	2.30177805878955
1967	2.31666360398916
1968	2.34565722465513
1969	2.36458276800438
1970	2.38964624618972
1971	2.41698688609048
1972	2.43507191786395
1973	2.43673031624286
1974	2.38046018878968
1975	2.20956629613945
1976	1.94910239283551
1977	1.73373458796687
1978	1.65630664787517
1979	1.73922309908541
1980	1.95433750600416
1981	2.20369921810179
1982	2.42361545140337
1983	2.57732965260522
1984	2.67547829088012
1985	2.75428028268301
1986	2.81404825287781
1987	2.85126281683303
1988	2.86936689074402
1989	2.86821621756126
1990	2.84248933441209
1991	2.80609494356005
1992	2.7535956926722
1993	2.68639560805134
1994	2.58417037869397
1995	2.45471620036543
1996	2.33644081489273
1997	2.09188072418956
1998	1.85404437177053
1999	1.75945208519293
2000	1.68600720393729
2001	1.62285673222063
2002	1.55306898212099
2003	1.46904422700425
2004	1.38084411454621
2005	1.45948723125249
2006	1.58692257953256
2007	1.58087153393389
2008	1.55232447601189
2009	1.52146861670776
2010	1.4894787970459
2011	1.45859508479977
2012	1.43097327467587
2013	1.40264986092754
2014	1.36491228821043
2015	1.42395616494124
2016	1.51981369057872
2017	1.53436449506028
2018	1.51870726808495
2019	1.49540481526456
2020	1.47745666003059
2021	1.43321406495938
2022	1.39649568386606
2023	1.37576862016302