Year	annual %
1961	1.6839423125937854
1962	1.682762193707508
1963	1.6680734469443985
1964	1.656171114638568
1965	1.6120628224807996
1966	1.541353769099079
1967	1.4868455044678497
1968	1.2909707442724843
1969	1.216604580482094
1970	1.3994000942273626
1971	1.322499441101926
1972	1.183269989509719
1973	1.1973154116814984
1974	1.0451034906482435
1975	0.8534868080046866
1976	0.8025023305094214
1977	0.6571021547852136
1978	0.6514462394281453
1979	0.5805287459931727
1980	0.4506130989405758
1981	0.20065410866181949
1982	0.05752496056808784
1983	0.06097800017683566
1984	0.07708173321648995
1985	0.16863836898914633
1986	0.2605188926784381
1987	0.25326878940897374
1988	0.17384736048921492
1989	0.18510619674748977
1990	0.2402851338584796
1991	0.292506210286496
1992	0.36249194560072706
1993	0.3649499687199843
1994	0.3695017883663916
1995	0.5527396079250125
1996	0.597701841387743
1997	0.4473065019508586
1998	0.39492575831583343
1999	0.3614434444221672
2000	0.35067918093833184
2001	0.41706362308916445
2002	0.43684812011959423
2003	0.400964130257149
2004	0.4994684032255432
2005	0.6138415379888773
2006	0.6100965005589271
2007	0.6697121043713884
2008	0.8121043264504569
2009	0.7279907662266512
2010	0.6067660490746668
2011	0.5982140628801327
2012	0.5888078794187377
2013	0.5888704896034707
2014	0.6421394017860177
2015	0.8390472384607026
2016	0.9128530688329182
2017	0.7744611852936001
2018	0.6290886027040454
2019	0.49458133494834355
2020	0.4302016378290914
2021	0.5740343041508684
2022	0.9313341430038288
2023	0.8859222458557638