Year	annual %
1961	1.6603126958412417
1962	1.680788741310053
1963	1.7859453720477632
1964	1.7770736220911658
1965	1.7751425277428439
1966	1.718239577379066
1967	1.5992458133388112
1968	1.4788282856940071
1969	1.355808824855302
1970	1.2022349077272168
1971	1.1681978795753167
1972	1.1922859479927865
1973	1.108841701969098
1974	1.0141974069938016
1975	0.8847925371959064
1976	0.7724643939220215
1977	0.7700204338416228
1978	0.7868788798434281
1979	0.7877273028745151
1980	0.8052554613273628
1981	0.7526574103911514
1982	0.5177238172928469
1983	0.3669947128014428
1984	0.267121254139397
1985	0.26806907646050604
1986	0.37696999374172435
1987	0.514807866891374
1988	0.5578408713575129
1989	0.5770664047582699
1990	0.6634427754973302
1991	0.7346521586206052
1992	0.6445941993014799
1993	0.6431946356353393
1994	0.5570489633364986
1995	0.4978712375769163
1996	0.48926805150360053
1997	0.47449341384857746
1998	0.44798567230748176
1999	0.49677303400494566
2000	0.5768753174667296
2001	0.626560508913613
2002	0.8197475403471088
2003	0.8820421430228294
2004	0.881399236639524
2005	0.8444854611697679
2006	0.7857208999631382
2007	0.8241919840930478
2008	0.790225210376704
2009	0.6265348649272511
2010	0.5405085617408361
2011	0.08306333801098731
2012	0.50125715315761
2013	0.6080355107340978
2014	0.6004230583505148
2015	0.5727331320176887
2016	0.566187582807018
2017	0.4899413840382181
2018	0.5231865057208722
2019	0.4198968282843367
2020	0.4327841264724981
2021	0.3111227297657848
2022	0.71602477498638
2023	0.9013938535389059