Year	annual %
1961	1.138924107930535
1962	1.7942615321005349
1963	2.3691543493803806
1964	2.316266849606066
1965	2.2875106760385364
1966	2.36073996849899
1967	2.294102467602471
1968	2.309774500327322
1969	2.3505558628629615
1970	2.346004605173974
1971	2.338657232954745
1972	2.2411350306844184
1973	2.1817186374383652
1974	2.1020566299053627
1975	1.9957029709850644
1976	1.935195130446445
1977	1.8684297148936082
1978	1.8344326886509066
1979	1.8271510592545752
1980	1.821764119829055
1981	1.849548466869038
1982	1.9018415509601425
1983	1.8763181645442302
1984	1.8360800024507
1985	1.8333373271663334
1986	1.8593394310276352
1987	1.8798691976201525
1988	1.8549636524638515
1989	1.7940307185752289
1990	1.7468432016030704
1991	1.6791149062882909
1992	1.5740054385024536
1993	1.505624329309768
1994	1.4697433409818643
1995	1.4332709742456586
1996	1.400610197196258
1997	1.3757176371033353
1998	1.3368168177966453
1999	1.2776846884130322
2000	1.2180076768497798
2001	1.1822875916776496
2002	1.1399747959106605
2003	1.1130412869320594
2004	1.1000825274214208
2005	1.0784902461822696
2006	1.0369742240349922
2007	0.9925130358493277
2008	1.0064401095604296
2009	1.0134676334702561
2010	0.9977206310520614
2011	1.0268277259732628
2012	1.0712807234637864
2013	1.086843475872982
2014	1.066424436843434
2015	1.0222821710147656
2016	0.9752988908034297
2017	0.9422101477348548
2018	0.8714801323244927
2019	0.8028836072101058
2020	0.7085824277311303
2021	0.572000989894832
2022	0.3612580608994165
2023	0.5027955060938609