Year	annual %
1961	5.002309924939652
1962	5.0085112761193065
1963	5.015176254661727
1964	4.940561981835493
1965	4.815952668133903
1966	4.624632226614309
1967	3.782687342886357
1968	3.401445059827832
1969	3.2692837772963363
1970	3.164686092347841
1971	3.058608402890344
1972	2.9329112980628294
1973	2.7849279282623836
1974	2.7016885166445985
1975	2.7522341663126006
1976	2.9369468499435296
1977	2.6762390338416457
1978	2.7627467360020455
1979	2.8538821267511545
1980	2.8675650609917924
1981	2.8555090627069744
1982	2.8402715981650606
1983	2.8221964500670196
1984	2.8111358421412618
1985	2.7435451524194443
1986	2.461253864377988
1987	3.2907404660000665
1988	3.171858823697727
1989	2.9625532180215854
1990	2.8529816363162914
1991	2.39604382686261
1992	2.070002816430125
1993	2.0811044021785077
1994	1.9631936645082793
1995	1.9181801293673688
1996	2.253302741006645
1997	1.971199141841614
1998	1.9915107419660456
1999	1.9858552325574086
2000	1.9211133465293462
2001	1.867922506111917
2002	1.8218300554133537
2003	1.7892323963871144
2004	1.7720064852846946
2005	1.7340479461740148
2006	1.7132772180521196
2007	1.6319021799690712
2008	1.6412442029495913
2009	1.5134263706585838
2010	1.4074647611354703
2011	1.3279748366720714
2012	1.2662181891486264
2013	1.2165535293923606
2014	1.1755436250809634
2015	1.1152773998623116
2016	1.0533098971211385
2017	0.9843715157889861
2018	0.9010969476304688
2019	0.830716449747723
2020	1.0847862837334956
2021	1.3115016260610164
2022	1.399308402482994
2023	1.5361837034905101