Year	annual %
1961	1.3926754298139343
1962	1.9904854636796756
1963	2.510818884841882
1964	2.4687445138560093
1965	2.4544419400535986
1966	2.5505992985979304
1967	2.4861718500710737
1968	2.5062380902029986
1969	2.5434064511085097
1970	2.529773008732377
1971	2.4834757050558665
1972	2.3951276965615165
1973	2.3756792647271965
1974	2.306728730472173
1975	2.202572124123293
1976	2.1329321684773817
1977	2.0799787559221414
1978	2.0754635961871486
1979	2.0860186335845725
1980	2.0704887647516017
1981	2.0908413120352094
1982	2.157433582950617
1983	2.1390168034897954
1984	2.087195517692237
1985	2.0884177816804055
1986	2.1094793505618696
1987	2.1243717821850367
1988	2.0979342594780235
1989	2.0493765732032045
1990	2.0689825200200858
1991	1.9550618776933675
1992	1.8827783446402862
1993	1.8358324362764051
1994	1.791817979912551
1995	1.7518214496262914
1996	1.727225070090725
1997	1.6935288916632771
1998	1.652049147611521
1999	1.6080261600447159
2000	1.5775040006081014
2001	1.555406633752554
2002	1.5262564042794367
2003	1.4906788171969936
2004	1.4655433929412993
2005	1.4429867361282618
2006	1.4116143573851474
2007	1.374601286898553
2008	1.3728646713869779
2009	1.3764784261585277
2010	1.3822272244633211
2011	1.400561302008981
2012	1.409432961164356
2013	1.3953100168992592
2014	1.371588656012392
2015	1.3404783419700834
2016	1.3189128843115867
2017	1.3125813227996304
2018	1.2770983250318722
2019	1.2354597620839058
2020	1.1739832431391761
2021	1.077838736780663
2022	0.9207746009571167
2023	1.0078154416126637