Year	annual %
1961	4.18739855514251
1962	4.156052475194237
1963	4.126497767944082
1964	4.089107004171756
1965	4.006988472349103
1966	3.908697746226154
1967	3.796960104047266
1968	3.676067550794706
1969	3.4993293792877402
1970	5.531069080155015
1971	10.580486136609268
1972	9.488079844350095
1973	8.327206473561077
1974	7.272819327021464
1975	6.309476548922005
1976	5.512631399561666
1977	4.823207855111726
1978	4.223708316909138
1979	3.7997384335016697
1980	3.378616668820733
1981	2.3466168260857483
1982	2.2965040980268334
1983	2.143784118796203
1984	2.0226564538559106
1985	1.9347916752938141
1986	1.8673795128932524
1987	1.813892214440374
1988	1.7692379803527742
1989	1.6074368201773024
1990	1.6011262232140582
1991	2.0663341867266025
1992	1.9992632037690934
1993	1.9143146288013377
1994	1.8371102911364594
1995	1.77068146390718
1996	1.6850904314313686
1997	1.5941486655324004
1998	1.5429294516483034
1999	1.5242392581592041
2000	1.3218682166984306
2001	0.9427140118697872
2002	0.7495379443642245
2003	0.6123822466154816
2004	0.4842213088675015
2005	0.3624453711872857
2006	0.2517013868500633
2007	0.15472813991700524
2008	0.07695118506250911
2009	0.009695528106842398
2010	0.2942962897519922
2011	0.5443545632401865
2012	0.5420448568346026
2013	0.4896546596399508
2014	0.3824217499614968
2015	0.348853334023769
2016	0.30684128702403235
2017	0.24078869894742977
2018	0.12830906088713165
2019	0.05127756281297741
2020	0.44289262090742576
2021	0.8478566306602844
2022	0.8046144062049874
2023	0.7623522135318728