Year	annual %
1961	2.42791114703887
1962	2.4829860932431274
1963	2.5148049807392994
1964	2.5552223785802965
1965	2.5888159262746626
1966	2.5865953976168043
1967	2.598330128358171
1968	2.6372731299380945
1969	2.6596447663437743
1970	2.6863530038885557
1971	2.701138752156808
1972	2.69146960604607
1973	2.7427868067511127
1974	2.8267127222903525
1975	2.8601579235281775
1976	2.858435596423604
1977	2.823605269196918
1978	2.9317905642373177
1979	3.0237033909825755
1980	2.916499304323878
1981	2.9494597963499274
1982	3.035353147046081
1983	2.894271489014116
1984	2.8083836324557296
1985	2.8633582403213182
1986	2.897063296848984
1987	2.9223609887750257
1988	2.8436722063954107
1989	2.8136578086739235
1990	2.808383746876814
1991	2.7267660622708974
1992	2.6723569765022575
1993	2.663661046430917
1994	2.624217050651694
1995	2.65356272049857
1996	2.6908571649016295
1997	2.6238646256198734
1998	2.597664424430718
1999	2.618452888492115
2000	2.6502016542674625
2001	2.6741898242935918
2002	2.6889843729075693
2003	2.6977773031215264
2004	2.7190100547873897
2005	2.7368497119354203
2006	2.7551397368333
2007	2.779975384146894
2008	2.7929546870628457
2009	2.7914689005243076
2010	2.7937984074130497
2011	2.7829969117015594
2012	2.7697659286108234
2013	2.7727595524809487
2014	2.765155187395891
2015	2.7704541954545903
2016	2.722040516675577
2017	2.6761689643623754
2018	2.6806178915114884
2019	2.6679760162315063
2020	2.6528516097025374
2021	2.593666118805544
2022	2.5421545264726433
2023	2.5353425102001523