Year	annual %
1961	2.8195576328208745
1962	3.059504432453082
1963	3.244000679568515
1964	3.222081062729899
1965	2.7072632251272495
1966	2.683824714235513
1967	2.6645252580419054
1968	2.660341099994511
1969	2.657865209047557
1970	2.6264830182600747
1971	2.6692085893247963
1972	2.600354543160364
1973	2.6321904727039964
1974	2.6607039894294644
1975	2.4855605863190533
1976	2.4997029500637638
1977	2.469903559016174
1978	2.6490942908834967
1979	2.8371027093871675
1980	2.8386860745096385
1981	2.868307766091945
1982	2.778209704617666
1983	2.6547107354429045
1984	2.6384292880253497
1985	2.6423183054643147
1986	2.6711880223279962
1987	2.6872119783079
1988	2.6639796105814924
1989	2.6023339638485226
1990	2.6030629695423073
1991	2.554348605304696
1992	2.48240123991512
1993	2.413356643796021
1994	2.36987201459209
1995	2.3238088189479384
1996	2.290816664328503
1997	2.2679324109329
1998	2.2433016481012658
1999	2.204708657082378
2000	2.187683100489508
2001	2.3022368284596695
2002	2.367002111925302
2003	2.335106382461234
2004	2.325936400024304
2005	2.3167229665401123
2006	2.289406140896773
2007	2.2503349848603875
2008	2.272442281464791
2009	2.2360157094445583
2010	2.193947885248164
2011	2.081146755942058
2012	2.0950783793776537
2013	2.0964945083031097
2014	2.0872740330660804
2015	2.066192676370804
2016	2.0338251633591256
2017	1.9939051165952577
2018	1.9385967858811313
2019	1.8760356816478492
2020	1.8029708386397374
2021	1.6094924862356805
2022	1.5507083847439844
2023	1.6953572424126548