Year	annual %
1961	1.397223698607263
1962	1.4159690147073718
1963	1.4445409219176355
1964	1.4488359271568925
1965	1.403790349054404
1966	1.511329527204282
1967	1.6780878455269885
1968	1.627635925113509
1969	1.6054567363325276
1970	1.5801053923471216
1971	1.577808005460568
1972	1.526033308788243
1973	1.5265675169803927
1974	1.580138188100122
1975	1.7533054904805851
1976	2.023716598482423
1977	2.0295597433310064
1978	1.7836972240630473
1979	1.8684445653573505
1980	2.0397243061366197
1981	2.371149399584141
1982	2.3561078960686217
1983	2.0931952285686606
1984	2.1168295610061847
1985	2.083497151356312
1986	2.0181187650830026
1987	2.0469992641538965
1988	2.0792129076194357
1989	2.065076840756632
1990	2.1652591842779714
1991	2.066762721381494
1992	1.6246381309261295
1993	1.2682416762808941
1994	1.187988521592274
1995	1.36317501061815
1996	1.3137343604266363
1997	1.2744183141428351
1998	1.2098624110851404
1999	1.1672683224743565
2000	1.162487950593416
2001	1.1572350386097554
2002	1.026361593143747
2003	1.0083638234123384
2004	1.1244168581455511
2005	1.0518481379578901
2006	1.0292962000260104
2007	1.1124811040784408
2008	1.1077426848298728
2009	1.0855416725616465
2010	1.1349218233821006
2011	1.332373559544564
2012	1.2999365490280752
2013	1.1729462827770476
2014	1.0877589834682198
2015	0.9523113954485751
2016	0.976167429553783
2017	0.9166072917399646
2018	0.935440118238489
2019	0.9454410231138723
2020	0.8161112721107884
2021	0.683358753436238
2022	0.676842124151463
2023	0.7279959726379133