Year	annual %
1961	2.72758993557211
1962	2.77827277836931
1963	2.82142073771671
1964	2.8707517800023
1965	2.92027217756085
1966	2.96667504863926
1967	3.00019184949004
1968	3.01754674590966
1969	3.02452869365742
1970	3.01837000421018
1971	2.99887431171555
1972	2.98309364047862
1973	2.97549500721894
1974	2.96958462549158
1975	2.9676619193083
1976	2.96295558752597
1977	2.91801661814879
1978	2.88677485730211
1979	2.89265654211564
1980	2.90774533917014
1981	2.94248795597118
1982	2.96178593005443
1983	2.95958790424242
1984	2.95244271412784
1985	2.9398329739151
1986	2.92007202111324
1987	2.90957936208952
1988	2.91507939677785
1989	2.54841243987655
1990	2.57454954842255
1991	2.96043871303152
1992	3.85564113556433
1993	4.0847344287677
1994	3.43278976904461
1995	2.7751565196712
1996	2.01601410816646
1997	2.25781782604059
1998	2.63077363875871
1999	2.71176862308068
2000	2.79918208413242
2001	2.4491651403647
2002	2.14496344480591
2003	2.16038855352539
2004	2.16989899804321
2005	2.20803458075482
2006	2.26047186619935
2007	2.31869406123366
2008	2.49989376010022
2009	2.72380028814205
2010	2.87305118502029
2011	3.01844276057634
2012	3.12478900195865
2013	2.89612211417799
2014	2.64221126030642
2015	2.64595710222511
2016	2.64252802228661
2017	2.63352411058118
2018	2.62618780349529
2019	2.6146547551014
2020	2.58400208033153
2021	2.55391077109444
2022	2.59160126770452
2023	2.6431022627714