Year	annual %
1961	0.20525649521184502
1962	0.1352720745374535
1963	-0.18780313915470342
1964	-0.5441525942983653
1965	-1.0126033904322123
1966	-1.3642122615475496
1967	-1.251329092926712
1968	-1.0533544796081333
1969	-1.5270534161935068
1970	-1.5215325442707859
1971	-1.0676745623679227
1972	-0.8044005392913646
1973	-0.623415214482326
1974	0.7311722239621127
1975	3.1322894001841175
1976	2.166366805595342
1977	0.38110657220085703
1978	0.390208757351143
1979	0.3767288120237484
1980	0.3778024863828112
1981	0.10213482325608035
1982	-0.3033825045649609
1983	-0.4627874636766321
1984	-0.5526870101673429
1985	-0.6743798537611005
1986	-0.8678988857031368
1987	-0.9950673033263038
1988	-1.0871953711957383
1989	-1.1370214952672044
1990	-1.218962596300437
1991	-1.2998171460240815
1992	-1.3687701334254065
1993	-1.1816119224929293
1994	-1.054070612114315
1995	-0.9947103163054607
1996	-0.9852126777486602
1997	-0.9272246454967344
1998	-0.8874491868671295
1999	-0.8446892454291075
2000	-0.7254704595089877
2001	-0.7193088497962934
2002	-0.8455657258255256
2003	-1.0352269940753016
2004	-1.1893636053100394
2005	-1.251879638854302
2006	-1.2780793268159913
2007	-1.2763904886440838
2008	-1.345594801483164
2009	-1.4045205029043173
2010	-1.4716718194121847
2011	-1.6803658806391595
2012	-1.9520893434559718
2013	-2.1012085237512386
2014	-2.102538279592229
2015	-1.9858929058783255
2016	-1.8956081782637941
2017	-1.8324329650440851
2018	-1.7541550965969217
2019	-1.5786234043731817
2020	-1.5025404651531138
2021	-0.9859674221032135
2022	-1.1568672421968664
2023	-0.5177801753406595