Year	annual %
1961	2.58438833288956
1962	2.662946053668705
1963	2.6959515452798684
1964	2.7366580825989075
1965	2.7501354666386675
1966	2.7732235543011257
1967	2.860490665436785
1968	2.826119598326926
1969	2.8500980315115214
1970	2.8667491225686774
1971	2.845348543185537
1972	2.8307787894102745
1973	2.895151318223313
1974	2.9140074129491893
1975	3.0648989079077325
1976	3.395462079175914
1977	3.341515876032531
1978	2.9191924229919692
1979	2.991617592017576
1980	3.256295612869465
1981	3.55837761602902
1982	3.518457975094293
1983	3.2635089550354053
1984	3.2811632346129898
1985	3.215516623860964
1986	3.174151661280206
1987	3.100267659034415
1988	2.9615071670633313
1989	2.9023411196493356
1990	3.556046200020873
1991	2.8265796226958173
1992	2.735455559042336
1993	2.3075274552214893
1994	2.1690276246716564
1995	2.2097038478250397
1996	2.148083969817918
1997	2.1376895026610043
1998	2.1086478290086745
1999	2.0875432216754177
2000	2.0877300399446455
2001	2.0727182881057757
2002	1.9096946487697295
2003	1.8762680526324402
2004	2.0074258612090716
2005	2.137315507495188
2006	2.305358111779256
2007	2.396577560818173
2008	2.415485567268945
2009	2.376652707408965
2010	2.225653115423327
2011	2.0220641706099656
2012	1.9880243762837324
2013	2.094285762588072
2014	2.0989525332397108
2015	2.0483251186565354
2016	1.909378525749844
2017	1.7749538868963697
2018	1.7921348457981026
2019	1.747742061152536
2020	1.429596074528689
2021	1.2934469536444908
2022	1.4613481695675716
2023	1.5220264519057167