Year	annual %
1961	2.1157891175984673
1962	2.1457230593849204
1963	2.190826850939345
1964	2.211359996207875
1965	2.2425674508674547
1966	2.272816410226227
1967	2.2757206267240946
1968	2.2959531838833414
1969	2.3239975478970507
1970	2.368198332125246
1971	2.3975679366381826
1972	2.4353397650056934
1973	2.5117473499820733
1974	2.5970468058790885
1975	2.6835509938001536
1976	2.6970733612559314
1977	2.7357318219659845
1978	2.814037880223296
1979	2.85041023938723
1980	2.845010772048795
1981	2.849793533823771
1982	2.8955002908300713
1983	2.720131076256166
1984	2.6158086443844866
1985	2.7053083762502013
1986	2.7115390367046217
1987	2.713601862379633
1988	2.7310606578470953
1989	2.7669978528621897
1990	2.654931025134033
1991	2.628368797948852
1992	2.730420957459941
1993	2.6713626445976644
1994	2.6306097062977614
1995	2.693235279166899
1996	2.6874994138508868
1997	2.6890289052538634
1998	2.721940716470911
1999	2.7062913067244665
2000	2.749599719173659
2001	2.79965352270915
2002	2.8114526890210954
2003	2.8164806461903567
2004	2.8286422334125945
2005	2.841211220091381
2006	2.8327797447118144
2007	2.8284092989347016
2008	2.8329161508621894
2009	2.8440372024023617
2010	2.8465357411518966
2011	2.848825772217765
2012	2.8128509346212525
2013	2.7618389767510365
2014	2.7507305679848315
2015	2.7233173374171713
2016	2.7130585103698763
2017	2.7062660758635104
2018	2.669238668027347
2019	2.6339820691134435
2020	2.6156461398579154
2021	2.5733774016879494
2022	2.539799442479179
2023	2.5408640904049093