Year	annual %
1961	2.4311910067447116
1962	2.465242354349442
1963	2.493211213983713
1964	2.5377845509379995
1965	2.581519392430721
1966	2.593044264225327
1967	2.6338292252143276
1968	2.689910359548591
1969	2.7040070701934695
1970	2.7190531183136386
1971	2.717785747336322
1972	2.6713939126940005
1973	2.702036040124227
1974	2.7803824533315833
1975	2.790712541185968
1976	2.771042411944464
1977	2.6977089534530876
1978	2.8401030817835107
1979	2.8759673106572166
1980	2.4031765162551295
1981	2.163138889341411
1982	2.490072703579173
1983	2.725364613367759
1984	2.753992784065133
1985	2.7382379171626496
1986	2.678043804693786
1987	2.709315138059182
1988	2.710780853917427
1989	2.7488189924964104
1990	2.654805990124572
1991	2.6274037141886595
1992	2.985213285037517
1993	3.1899306275515897
1994	2.9982693181114684
1995	2.890005986245228
1996	2.8813576282924203
1997	2.7901462953858243
1998	2.778436416156623
1999	2.811853536134919
2000	2.7230069331731954
2001	2.717737089963407
2002	2.9615999935382433
2003	3.018803002378334
2004	2.879742309326744
2005	2.8852050187451823
2006	2.918957274094879
2007	2.825367036429199
2008	2.8346805827144266
2009	2.8902409490911225
2010	2.8388363117520754
2011	2.848695352409365
2012	2.8653057505069626
2013	2.8612540908702613
2014	2.9123638053182077
2015	2.9028504574512937
2016	2.91934080264636
2017	2.944261595275364
2018	2.8849901846883768
2019	2.8368011757281266
2020	2.8175433181468463
2021	2.7551621341811057
2022	2.686106464857346
2023	2.6809239862276115