Year	annual %
1961	3.46698748533725
1962	3.45465182855273
1963	3.40798255534598
1964	3.33459440663051
1965	3.23962984674272
1966	3.13734984616425
1967	3.04215475912023
1968	2.95666345385563
1969	2.89133488959909
1970	2.85092594471647
1971	2.82167803769203
1972	2.78453318041965
1973	2.7512606947101
1974	2.72041452145224
1975	2.66550854894221
1976	2.59957898092389
1977	2.54194604316514
1978	2.49980242808638
1979	2.4659269578138
1980	2.42215933593436
1981	2.41671421878825
1982	2.45976893984563
1983	2.5043300022613
1984	2.56126429829383
1985	2.64397715710042
1986	2.73074811230789
1987	2.77021423683528
1988	2.72053267996416
1989	2.69222643733856
1990	2.69644908511256
1991	2.69184093158309
1992	2.69982742388178
1993	2.64725469399483
1994	2.4824860654177
1995	2.23908412329296
1996	1.74658473889098
1997	1.44447282966115
1998	1.5428058618971
1999	1.5575182450144
2000	1.50061066998589
2001	1.4333226775008
2002	1.36864308511031
2003	1.2692130459731
2004	1.26957330067416
2005	1.35971482322199
2006	1.38732630688867
2007	1.42031742897792
2008	1.48524549123721
2009	1.57329741344839
2010	1.665530086186
2011	1.74701805032668
2012	1.80920990684314
2013	1.8407825771759
2014	1.83654332210519
2015	1.80727172800112
2016	1.75561140344976
2017	1.68665774624937
2018	1.60693880017627
2019	1.52748266915759
2020	1.4831290153972
2021	1.45197711119455
2022	1.39229698415698
2023	1.31817552142514