Year	annual %
1961	3.8304169307614444
1962	3.992102568548603
1963	3.999338819754783
1964	4.012258712705034
1965	3.9614872516910964
1966	3.920609537554668
1967	3.9391335261673106
1968	3.9285555389717075
1969	3.9244958810485997
1970	3.896677873931509
1971	3.908276086204026
1972	4.109322977172724
1973	4.14691050529099
1974	4.133065395253837
1975	3.6577707537838364
1976	4.083298918032781
1977	4.054877607574284
1978	4.0595708373516
1979	4.061251337015719
1980	4.142942621748631
1981	4.223945214191232
1982	3.9506615320991756
1983	3.877907116564245
1984	3.8446636523741944
1985	3.817370282959672
1986	3.782356333190421
1987	3.6967216563394913
1988	3.6453823858944077
1989	3.6006220613775923
1990	3.7976336871381307
1991	3.4322800659108594
1992	3.215319759891628
1993	3.0620534581464938
1994	3.0116317662665324
1995	3.0057272933164967
1996	2.977297062545702
1997	2.9292334009558942
1998	2.867594142635326
1999	2.799155986768625
2000	2.779264367816438
2001	2.7237856658991717
2002	2.7144989767399466
2003	2.636281412077963
2004	2.6262987993768405
2005	2.596420701960639
2006	2.5929808221821986
2007	2.5568006840482838
2008	2.511913544886582
2009	2.476794385958044
2010	2.473355371530104
2011	2.4089984000157187
2012	2.3220120384313674
2013	2.3096962807820205
2014	2.3255391911798995
2015	2.3527640723031595
2016	2.2906635734168077
2017	2.22183746814153
2018	2.2019292027677153
2019	2.1770243589462694
2020	2.083596249304648
2021	1.9856292068593575
2022	1.9956408674820523
2023	2.0697961726018548