Year	annual %
1961	-0.09230184962699783
1962	-0.5624719617845451
1963	-0.5817508265901896
1964	-0.5532628411814922
1965	-0.7339158796519004
1966	-0.08073895692669485
1967	1.955961029347493
1968	1.9820513346843378
1969	1.9775009484051742
1970	1.9608529514158721
1971	1.9799387714853873
1972	2.032661676339209
1973	2.096511318232945
1974	2.1755409612283096
1975	3.419915042983174
1976	4.535675347143895
1977	3.0414667223184577
1978	1.3907373546082555
1979	1.4776593937895295
1980	1.5607065473907162
1981	1.6461868858876918
1982	1.696003171217404
1983	1.7201071681725295
1984	1.714172097032048
1985	1.7035543505075363
1986	1.6017428251516463
1987	1.3283469142872806
1988	1.165385093758709
1989	1.0287364637957226
1990	0.8649149497289661
1991	0.7306448795245152
1992	0.6419253938092639
1993	0.5385535150926399
1994	0.3809341397774601
1995	0.16542840098782732
1996	-0.018244154239725623
1997	-0.11623097072251255
1998	-0.3173233807247805
1999	-0.5515113946671519
2000	-0.5764568548230362
2001	-0.6223981452685444
2002	-0.6798169790755658
2003	-0.7005479912663888
2004	-0.6743753081529751
2005	-0.7397051610717795
2006	-0.6909132382630399
2007	-0.527500610725753
2008	-0.47622248558120817
2009	-0.3778076205355682
2010	-0.31708502116425014
2011	-0.2691054992142504
2012	-0.2177133413205489
2013	-0.18264974687748492
2014	-0.16378332673472
2015	-0.12804504218261012
2016	-0.12475226075635236
2017	-0.14259833646922412
2018	-0.18283459402860228
2019	-0.2277370055515785
2020	-0.3174276066004391
2021	-0.37290443809259416
2022	-0.37693962108570117
2023	-0.43163464283459857