Year	annual %
1961	5.38609360953755
1962	5.36350955892519
1963	5.344262343606235
1964	5.334768772447015
1965	5.313628373858969
1966	5.300778739672619
1967	5.271395258241585
1968	5.270213260864527
1969	5.26615868746653
1970	5.270707974505408
1971	5.281581273232445
1972	5.30409298953771
1973	5.258267459548026
1974	4.956861413264411
1975	4.679553154568301
1976	4.819906335218324
1977	4.799408075085624
1978	4.774287079386841
1979	4.752728269175393
1980	4.7200852526095005
1981	4.676371947631825
1982	4.624622105137119
1983	4.57510011760476
1984	4.523803834515601
1985	4.4573773086841975
1986	4.408547619861395
1987	4.364603334101072
1988	4.274219190141431
1989	4.026105815182218
1990	4.021562327651764
1991	4.014276453260443
1992	4.007412568445183
1993	3.9926185011429673
1994	3.9804587384584167
1995	3.960519658158589
1996	3.937535858756285
1997	3.9140226579381405
1998	3.779062907853608
1999	3.770789971626671
2000	3.8507421667498645
2001	3.791688008475966
2002	4.023187861704478
2003	3.9589405772867714
2004	3.875947910973035
2005	3.788189757732542
2006	3.7085235361448197
2007	3.6194485134805596
2008	3.528725238063055
2009	3.4381833970701026
2010	3.35618987880396
2011	3.2700675921805895
2012	3.197257819015863
2013	3.121464788686378
2014	3.0592720299786493
2015	2.9964824297476076
2016	2.941139498785929
2017	2.887097406388413
2018	2.8352163969277093
2019	2.7849812331584607
2020	2.7065036004047407
2021	2.5969990915284167
2022	2.5344591691842675
2023	2.5524372865534977