Year	annual %
1961	2.7017138706755977
1962	2.7338355344648355
1963	2.8874227607777767
1964	2.9443465168556027
1965	2.9247782473552255
1966	2.8853230814631337
1967	2.83115486169059
1968	2.7769753613253347
1969	2.734508475674904
1970	2.699247853890742
1971	2.701369346895542
1972	2.761050928614083
1973	3.796595537965934
1974	3.8729491057405085
1975	3.8626183612284435
1976	3.8407938855632184
1977	3.8299110493328654
1978	3.834868058569575
1979	3.862409492161186
1980	3.9367536995586616
1981	4.007474823164923
1982	4.049395137252806
1983	4.462931879579743
1984	4.465826452617881
1985	4.449274865017781
1986	4.433225926318254
1987	4.401695449046962
1988	4.368116892939444
1989	4.301035530779315
1990	4.236078431336261
1991	4.163486500830559
1992	4.082478979698278
1993	3.8226087065300103
1994	3.7155551651761343
1995	3.628567454440248
1996	3.539069179888471
1997	3.4433865722653003
1998	3.3500988254388195
1999	3.237348641978687
2000	3.086699849536002
2001	2.83866535468301
2002	2.5547785332869095
2003	1.9184705673979219
2004	1.7452654151877265
2005	1.6825434264505497
2006	1.6155560040572312
2007	1.5581099509185041
2008	1.536864538772426
2009	1.5650892359349005
2010	1.6996443052656942
2011	1.8409088070961181
2012	1.8898689468304266
2013	1.863251267780564
2014	1.865663945407984
2015	1.8773593411798957
2016	1.8782533083646005
2017	1.8549190427894613
2018	1.8378218043391337
2019	1.8128217577575614
2020	1.838800142199707
2021	1.7797038165812111
2022	1.6551659920907995
2023	1.7098094138569002