Year	annual %
1961	2.105090736259183
1962	1.6619134690907276
1963	1.6555147421762693
1964	1.6442758733784428
1965	1.644791114232886
1966	1.6225103262884017
1967	1.6011389366330535
1968	1.5931151647029236
1969	1.630361494176761
1970	1.9729163593129349
1971	2.4443912767498013
1972	2.474866191230754
1973	2.5457131339588064
1974	2.57036372109108
1975	2.576262500200065
1976	2.5715487700083886
1977	2.6482717585716626
1978	2.752228844522292
1979	2.7845476761419947
1980	2.6641222667122824
1981	2.56101494128309
1982	2.670676741148962
1983	2.7884574884592026
1984	2.1826399545850235
1985	1.2705993503098458
1986	1.2776272950261578
1987	1.335416166274752
1988	1.4025325165449036
1989	1.4560008984002715
1990	1.457760346891191
1991	1.3807951370646872
1992	1.3047923190764688
1993	1.2482563466380814
1994	1.1352909908192195
1995	1.0636785564365683
1996	1.025615608554145
1997	1.057741233667984
1998	1.0975817457100916
1999	1.09990182670192
2000	1.1965950842668747
2001	1.4540477848745963
2002	1.5242881412570493
2003	1.4714716931883713
2004	1.4046828493108123
2005	1.3813778239039227
2006	1.3402507375647723
2007	1.2875018833665273
2008	1.234789564479034
2009	1.1838338174750682
2010	1.0957543825866927
2011	1.0468447161988697
2012	1.0537983917743294
2013	1.0340215861632789
2014	0.9774244310023775
2015	0.9220014924910402
2016	0.8848541521751111
2017	0.7701533052269645
2018	0.6475015774649446
2019	0.6055177890497312
2020	0.5722462266865885
2021	0.5053415250514462
2022	0.4281641030133351
2023	0.394881532475185