Year	annual %
1961	1.2048890077664112
1962	1.215253203647265
1963	1.1746469556634338
1964	1.1490498798019075
1965	1.1077075990568943
1966	1.0358893829016864
1967	0.9825198756590936
1968	0.9429922996781812
1969	0.9277081282893107
1970	0.9079116102727198
1971	1.1144414867721935
1972	0.9367696035260735
1973	0.8733389175364294
1974	0.8372543744125522
1975	0.789377109417444
1976	0.7021906962070261
1977	0.683865415887027
1978	0.684742212876472
1979	0.712216204807433
1980	0.6794589231426329
1981	0.670600757857926
1982	0.6113706990703065
1983	0.5583938969375026
1984	0.5180141931886055
1985	0.5164876124800202
1986	0.5409854894339787
1987	0.5569501333633582
1988	0.5769972962405063
1989	0.6200413358719743
1990	0.6409397628990519
1991	0.7392813135942475
1992	0.6983983199033332
1993	0.6449005490514139
1994	0.5731929721482629
1995	0.535900483885527
1996	0.5508012172551418
1997	0.5239254706446985
1998	0.4909605911831676
1999	0.4783062800512994
2000	0.5004219799498202
2001	0.47873897933237686
2002	0.5008794377261268
2003	0.4962773352556553
2004	0.5121866447849186
2005	0.5021104627690249
2006	0.5388100996665628
2007	0.5842265610161377
2008	0.6028251848579629
2009	0.5123303866266582
2010	0.4635940757922583
2011	0.27343016602132764
2012	0.41755487161077554
2013	0.43791999784983204
2014	0.45507340115750594
2015	0.4486517625258273
2016	0.45380826418148956
2017	0.38178132864811687
2018	0.35584469507885785
2019	0.289314178945574
2020	0.37001154940170977
2021	-0.07868777328499732
2022	-0.20571891864793201
2023	0.4598508484753694