Year	annual %
1961	2.571718348639479
1962	2.619387932884294
1963	2.67005104769747
1964	2.7019459433196573
1965	2.72686165668685
1966	2.771814423575904
1967	2.838558591262739
1968	2.870968689320975
1969	2.8793593742489207
1970	2.8671732245961294
1971	2.8611312207891757
1972	2.8780772848719067
1973	2.916094803340229
1974	2.9893732938343334
1975	3.1912985462664807
1976	3.5689590921795826
1977	3.504398032298255
1978	3.1463009240082727
1979	3.3639712168454423
1980	3.513750704605471
1981	3.226781403456428
1982	3.159203093381805
1983	3.2223023856607256
1984	3.1569089177660317
1985	3.0473060204384836
1986	3.0412807525441963
1987	2.9604363668773033
1988	2.674898074441529
1989	2.6077111501720367
1990	3.151268683250663
1991	2.174961331018295
1992	2.4958131508443273
1993	2.7032802352699576
1994	2.7169136718255658
1995	2.486878866430146
1996	2.4043528061862958
1997	2.368798182262438
1998	2.318572882080531
1999	2.2866822574158903
2000	2.2859343173938385
2001	2.245601500772736
2002	2.2167074815321257
2003	2.1846765192763797
2004	2.1777935778165727
2005	2.3333270422907617
2006	2.5406584279398743
2007	2.675717433318539
2008	2.705857514117511
2009	2.6323322674806064
2010	2.4378449334000436
2011	2.174204882872502
2012	2.1571961933289856
2013	2.299823498084862
2014	2.2592256749777135
2015	2.155966313224255
2016	2.109697128451259
2017	2.0687388460712413
2018	2.0961940152885745
2019	2.0626869010707622
2020	1.7578990069759186
2021	1.6233351872385242
2022	1.7883385403946193
2023	1.8479545475410077