Year	annual %
1961	2.2780973965342866
1962	2.278969919124527
1963	2.156266046713489
1964	1.6027148482502247
1965	1.6011363875680515
1966	1.6044235571362733
1967	1.6195609377941214
1968	1.6356401201692774
1969	1.637495508856451
1970	1.6189898260774624
1971	1.8125946533209591
1972	2.496483596908722
1973	2.4739244699076233
1974	2.6306203679282305
1975	2.59455886877764
1976	2.5533762393841006
1977	2.497612403327575
1978	2.3629489503308077
1979	2.1479551518728206
1980	2.171445538672881
1981	2.255360732555803
1982	2.1700790031828268
1983	2.0529448613605115
1984	1.904287460561108
1985	1.8071187870236198
1986	1.7579648379453356
1987	1.7151103177811207
1988	1.719301327246983
1989	1.7688666217927802
1990	1.7636293021433762
1991	1.7334104809391027
1992	1.68424558200941
1993	1.6238105219245809
1994	1.553563382171775
1995	1.5126003511461483
1996	1.5678786737502521
1997	1.3908178508199414
1998	1.2627183402046775
1999	1.1698428326301311
2000	1.1100278453312582
2001	1.0129828436861705
2002	0.9334365536544196
2003	0.8754023235964945
2004	0.8431620548175728
2005	0.9163156628107725
2006	0.9199097218786695
2007	0.946526075788416
2008	0.9696042789600895
2009	0.9950543067527176
2010	1.0099480282987656
2011	1.0157816681538292
2012	1.0127921056435887
2013	1.0011376466870268
2014	0.9887772601010804
2015	0.9758910557541821
2016	0.9645174649144402
2017	0.9188985092068334
2018	0.8689046315209649
2019	0.8100174481076061
2020	0.7577644759641519
2021	0.7425669382788209
2022	0.7308308151748478
2023	0.672275969514607