Year	annual %
1961	4.2222623731821045
1962	3.936494059110629
1963	4.050893773403089
1964	4.095091328837725
1965	4.127768186523355
1966	4.1580381099907555
1967	4.1800933871537325
1968	4.195980878603308
1969	4.211715045423688
1970	4.281277739463235
1971	4.615553035466746
1972	4.550254623258127
1973	4.7362714658123934
1974	4.832726289553662
1975	4.902748402781683
1976	4.931635925481714
1977	4.848490901172767
1978	4.863498096775814
1979	4.887910019794532
1980	5.0668789189147105
1981	5.485456343395342
1982	5.0770544377765106
1983	4.728901659408294
1984	4.558761952852137
1985	4.692964357128233
1986	4.773323406628975
1987	4.748357831051635
1988	4.679029575238587
1989	4.645853055976019
1990	4.660170318592122
1991	4.179605483718689
1992	3.9091249949932063
1993	3.7946960908376752
1994	3.8614275998177305
1995	3.868323091193517
1996	3.916369949455728
1997	3.8409302985982947
1998	3.7549856301297524
1999	3.6518104572204066
2000	3.800069128897249
2001	4.094611861352689
2002	3.837209448563712
2003	3.664452031360412
2004	3.688087114411175
2005	3.6520340091575747
2006	3.646376612259104
2007	3.6919931629921194
2008	3.720596601076437
2009	3.7600904021255985
2010	3.8679745190171673
2011	3.729648194670702
2012	3.441202506705835
2013	3.3154415352496756
2014	3.2521512096344907
2015	3.1749420981612957
2016	3.1094448718810668
2017	3.140914391103422
2018	3.203500368068376
2019	3.220951843638602
2020	3.2699490563177704
2021	3.2887358293050966
2022	3.300718536862874
2023	3.3320618846775147