Year	annual %
1961	3.69699520474949
1962	3.82251723158949
1963	3.87960469398829
1964	3.89099524598255
1965	3.89241284655644
1966	3.89189944158687
1967	3.89417883426667
1968	3.90523031475106
1969	3.97991247095798
1970	4.13648498293964
1971	4.31975011438394
1972	4.46471835248718
1973	4.53425560989303
1974	4.55401601739572
1975	4.55290426981297
1976	4.12598047543546
1977	3.75368877154463
1978	3.76999534562671
1979	3.76611413198712
1980	3.7727007031637
1981	3.75586724180339
1982	3.717022456039
1983	3.6639084973874
1984	3.59078763348492
1985	3.49958205597395
1986	3.40738558866676
1987	3.3766527143988
1988	3.49877125472946
1989	3.730526455312
1990	3.83042377895307
1991	3.77913676848152
1992	3.72188911543233
1993	3.65659816548026
1994	3.58341952827983
1995	3.54062880080402
1996	3.51260558248228
1997	3.48008353979121
1998	3.35691945622114
1999	3.0240202346513
2000	2.73825090531507
2001	2.61901409623771
2002	2.51050671514096
2003	2.41659690314912
2004	2.33745599030944
2005	2.26751371599435
2006	2.20965613638884
2007	2.16087988372223
2008	2.13051547484823
2009	2.11781907640103
2010	2.1163624191381
2011	2.0752447134814
2012	2.05543493401974
2013	2.06192649501195
2014	2.31524274847183
2015	2.58076728931826
2016	2.58067580845527
2017	2.58625429610958
2018	2.56647493405036
2019	2.53128744560298
2020	2.50861820334885
2021	2.455303010444
2022	2.45270320081193
2023	2.49863016801663