Year	annual %
1961	3.437535540151558
1962	3.3148590402622373
1963	3.2819126110688672
1964	3.319395539565061
1965	3.300401186296429
1966	3.263671924600458
1967	3.2186165035230916
1968	3.176608980048276
1969	3.171352942203378
1970	3.102762991345139
1971	2.7285864272016944
1972	2.808688941503056
1973	2.816280350034189
1974	2.7557916656711776
1975	2.655341620177367
1976	2.537344252559614
1977	2.4570745380648717
1978	2.4372225689128144
1979	2.452521755026013
1980	2.5281510104463623
1981	2.609783556328121
1982	2.6176910312569266
1983	1.9206811758018094
1984	1.8166352880850656
1985	1.648444878349828
1986	1.4551777201160152
1987	1.2945058949094594
1988	1.2081851594118265
1989	1.2002655986962918
1990	1.1967685026095705
1991	1.253780573077079
1992	1.4191961599052896
1993	1.4806429923350064
1994	1.4919678009477362
1995	1.484207856675886
1996	1.405999656065871
1997	1.338027956540647
1998	1.3109864395026243
1999	1.2263076145397611
2000	1.0761150594956554
2001	0.9642402719791122
2002	0.8675113446599013
2003	0.838687469284281
2004	0.8469776591556075
2005	0.8335687188844636
2006	0.8303959036554518
2007	0.7792266278412024
2008	0.7261526152945692
2009	0.7537754402416005
2010	0.7680799031550891
2011	0.7952488570998466
2012	0.8695990499497602
2013	0.8831368166915303
2014	0.840344133328636
2015	0.8101104755215786
2016	0.7769239669891945
2017	0.7093544047496774
2018	0.6562048590856383
2019	0.6259667810605887
2020	0.8171356610195784
2021	0.8607766486700604
2022	0.6151659665921292
2023	0.5821105482144309