Year	annual %
1961	4.814122456389734
1962	4.879907901322683
1963	4.886339023595524
1964	4.880488816108154
1965	4.864946258126563
1966	4.819066749403755
1967	4.757864553095299
1968	4.706574195582895
1969	4.635688874800308
1970	4.532770647326567
1971	4.424266274280667
1972	4.3736957325078745
1973	4.3245594707941954
1974	4.267954483379083
1975	4.201289617398867
1976	4.115339680905454
1977	4.083943174317343
1978	4.05937890496301
1979	3.9330881231498296
1980	3.6419823993016527
1981	3.029843225084497
1982	2.8180608251095505
1983	2.767696578114635
1984	2.696152034929928
1985	2.6103412340182772
1986	2.5256148042350417
1987	2.4516784547412955
1988	2.4218979945448678
1989	2.3850621390816484
1990	2.486373510669646
1991	2.530709025940353
1992	2.496049510389863
1993	2.466094869721922
1994	2.4360907860503525
1995	2.380202228973731
1996	2.192073728969879
1997	2.07913487858911
1998	2.0328203058326397
1999	1.9836901639295204
2000	1.961319695561759
2001	1.9732783521904471
2002	1.9459599387844337
2003	1.9071383624649039
2004	1.8850048510026782
2005	1.8379025233850594
2006	1.7633537031172775
2007	1.7122359036728108
2008	1.6593824073570291
2009	1.6219019921240394
2010	1.7064033681494402
2011	1.8073070747990396
2012	1.772296087815335
2013	1.6914361200733752
2014	1.6143460911167669
2015	1.5359802968669025
2016	1.5008486774346015
2017	1.4441855406099606
2018	1.3128668791684117
2019	1.218921360037581
2020	1.0833782273575836
2021	0.9118239772623185
2022	0.9785428290188815
2023	1.0896977801181469