Year	annual %
1961	2.0612065790690366
1962	2.103466731839589
1963	2.1096169034084227
1964	2.1300343463999525
1965	2.1467993055334063
1966	2.1442353529502753
1967	2.1428431375152996
1968	2.1684808427293376
1969	2.1755458337345175
1970	2.2131465857849264
1971	2.185561274231347
1972	2.1491333451556756
1973	2.194937764380228
1974	2.288705335139724
1975	2.3095844723890053
1976	2.296113756428923
1977	2.2675029330782195
1978	2.3582165330745966
1979	2.5057135222093194
1980	2.406683083239784
1981	2.3964323835570696
1982	2.4894812120840726
1983	2.2947411060745253
1984	2.1393432209421377
1985	2.1285202911187895
1986	2.1210378745422247
1987	2.138430866548191
1988	2.056194343915976
1989	2.03059537420242
1990	2.033503272953908
1991	2.104561601431314
1992	2.0606096997027805
1993	2.046722213358237
1994	2.0095957314736523
1995	2.083184381626552
1996	2.199996310855255
1997	2.1041287842649155
1998	2.0607687359200924
1999	2.0820500670746185
2000	2.1114962691511465
2001	2.036228791735823
2002	2.0308548303036673
2003	2.0324166993303407
2004	2.0414391451639915
2005	2.0300034991498137
2006	2.0470729648357775
2007	2.132472848086138
2008	2.0035776078307492
2009	1.9885227520692723
2010	1.972163296639124
2011	1.94513699132726
2012	1.9415625795332687
2013	1.9347619032779448
2014	1.8975501804703043
2015	1.870370170500891
2016	1.8356939084567898
2017	1.7880646270972704
2018	1.76591626336851
2019	1.7496508299103937
2020	1.7256849744349267
2021	1.6577049272386262
2022	1.5922461676564694
2023	1.5713411548279481