Year	annual %
1961	3.519715253721703
1962	3.4726767973376904
1963	3.3643793839875675
1964	3.2788490449854493
1965	3.267634969407972
1966	3.261634377514292
1967	3.180369380671903
1968	3.0999161070523034
1969	3.0544655885794123
1970	2.9937225373772254
1971	2.864889723650375
1972	2.7475475970295635
1973	2.6557884987310834
1974	2.584107570021537
1975	2.4668709532481166
1976	2.3537235468838147
1977	2.2940635641939164
1978	2.226386301237611
1979	2.1275974816870757
1980	2.065117022770251
1981	2.1503445821552454
1982	2.2044578358942615
1983	2.120446519333541
1984	2.040690702554281
1985	1.9625122729642257
1986	1.8628545495269142
1987	1.7612290406201836
1988	1.6798107643238933
1989	1.6062925707895404
1990	1.525095808146049
1991	1.555042518686185
1992	1.239381477381295
1993	1.191206730875699
1994	1.1200806374339964
1995	1.0329978512393985
1996	0.9304636014419986
1997	0.804881422160284
1998	0.7177135252129855
1999	0.6617274158775006
2000	0.6476554962714351
2001	0.645419872219124
2002	0.6316824085916781
2003	0.49981432864354364
2004	0.358477998106102
2005	0.3002834040784968
2006	0.25396598378325963
2007	0.258986694473885
2008	0.34490266669937014
2009	0.3718383972191216
2010	0.3181557153805788
2011	0.2482062318027476
2012	0.23271627507683515
2013	0.21176609626554127
2014	0.3020114762325163
2015	0.39512606798772404
2016	0.3109392310463462
2017	0.4051594553586403
2018	0.5437374269206111
2019	0.4538860370236578
2020	0.5113252266976236
2021	0.5033447026021026
2022	0.41871761990259926
2023	0.5431456959098903