Year	annual %
1961	2.9159028581753703
1962	2.925872195312188
1963	2.9077886634602264
1964	2.865369359648545
1965	2.8150776906931885
1966	2.760278487735582
1967	2.7143158538076517
1968	2.679322966036106
1969	2.625059933135851
1970	3.0054740344023254
1971	3.483297324482527
1972	3.4413326864048446
1973	3.4235738398341717
1974	3.431870065419836
1975	3.4565445251573963
1976	3.4796008209178853
1977	3.4895178133615943
1978	3.464921516875031
1979	3.3251178973205375
1980	3.1645182551810787
1981	3.117984909181619
1982	3.1214564263229896
1983	3.143359914804416
1984	3.1825905979099978
1985	3.1682352518275363
1986	3.2239625861562744
1987	3.3481591840675775
1988	3.3697068101504177
1989	3.7318121111282085
1990	3.7166365035192954
1991	3.350923567952291
1992	2.5957110227431004
1993	1.8788487851450395
1994	2.2798444131703786
1995	2.682190036921803
1996	2.753534097531622
1997	2.080408031537014
1998	1.3734467395523193
1999	1.2431925573539384
2000	1.6919794509743336
2001	2.1391942791133984
2002	2.050471150157746
2003	1.9760770965075372
2004	1.9092583760658977
2005	1.860959481351752
2006	1.8315486112549146
2007	1.8360949310492893
2008	1.874767166009579
2009	1.9437615024734074
2010	2.0275469724095365
2011	2.1152149526310047
2012	2.1472100085764185
2013	2.1800178874964984
2014	2.2151831849906545
2015	2.228126009272899
2016	2.1846842145395553
2017	2.089376683607803
2018	2.036210258366417
2019	2.021966324479361
2020	1.9130397303071267
2021	1.8404942064095948
2022	1.7224877861505985
2023	1.5285019704704317