Year	annual %
1961	1.15992000287416
1962	1.22958290356959
1963	1.29222298809629
1964	1.34986225652964
1965	1.41721114091367
1966	1.48885675093342
1967	1.5512048397086
1968	1.61244637339739
1969	1.90242812989825
1970	2.12629222005909
1971	2.07168820635825
1972	2.04490632654547
1973	2.06738243230401
1974	2.12340852013601
1975	2.19751546697209
1976	2.28325865201634
1977	2.36922942892654
1978	2.44549401198525
1979	2.50345350522981
1980	2.55410817141876
1981	2.61230073146174
1982	2.65413667167756
1983	2.68813943077155
1984	2.71452318623834
1985	2.72991846330793
1986	2.74748947078864
1987	2.76444266122502
1988	2.7730763355268
1989	2.76068116838737
1990	2.73474058326443
1991	2.70630553545604
1992	2.68165432295262
1993	2.65790057352722
1994	2.61441355886646
1995	2.55956561249268
1996	2.52036935341914
1997	2.50656036231903
1998	2.51314888122286
1999	2.52458119257744
2000	2.55979388649606
2001	2.60954321589185
2002	2.65137953739362
2003	2.69874699554435
2004	2.76976312159116
2005	2.86881302760127
2006	2.98452993581194
2007	3.09560977258065
2008	3.18807653024551
2009	3.2929774631171
2010	3.42197068660406
2011	3.52516187757304
2012	3.55822259981442
2013	3.50515739344233
2014	3.34110410137597
2015	3.08691638355563
2016	2.80421210921345
2017	2.55591859788162
2018	2.39135522463594
2019	2.28985536531904
2020	2.19563704311712
2021	2.09798810279019
2022	2.02168710210066
2023	1.97181513140581