Year	annual %
1961	4.569348367208789
1962	4.646302741527265
1963	4.768396236074409
1964	4.860071135998467
1965	4.922500380344715
1966	4.860352771793842
1967	4.878933075544452
1968	4.923300138044368
1969	4.958345351624004
1970	4.873853753715181
1971	5.024156481664079
1972	5.06887624219361
1973	5.0781303555607025
1974	5.057091498367086
1975	5.08220314951231
1976	5.068116583704779
1977	4.951149967317846
1978	5.069521073072664
1979	4.904357271351813
1980	4.725092654887078
1981	4.867743115949665
1982	4.884449024064878
1983	4.878855546887522
1984	4.968096098071982
1985	5.1714146559115335
1986	5.2639888481192685
1987	5.24093740022586
1988	5.105173342849213
1989	4.997176202426573
1990	4.908071800249218
1991	4.366437062845719
1992	4.249742980935764
1993	4.220640244128589
1994	4.142857561236951
1995	4.03430514600484
1996	3.856878726939911
1997	3.83881605096461
1998	3.831585570923096
1999	3.830225443900929
2000	3.846911710772531
2001	4.067790627204147
2002	4.098006747880618
2003	4.094759853332363
2004	4.113285132268473
2005	4.162252743883315
2006	4.153520532466587
2007	4.033148400562567
2008	4.292449177016692
2009	4.283528755647879
2010	4.286644946808906
2011	4.2722506149194
2012	4.2085383129401635
2013	4.196770574086159
2014	4.207500213030045
2015	4.233538928294962
2016	4.130224035468274
2017	4.056057631802062
2018	4.070872554516299
2019	4.032824777170703
2020	4.000593942257538
2021	3.9244248426638393
2022	3.8616048049584037
2023	3.846890630079642