Year	annual %
1961	0.698674198841573
1962	1.3471995673579613
1963	1.9280578387984377
1964	1.864120101487572
1965	2.1750714234784994
1966	2.268155667164123
1967	2.1711459785457095
1968	2.1868735943824333
1969	2.2322961061229023
1970	2.2175027297089116
1971	2.1303829537893932
1972	1.9902388050753785
1973	1.9169278323417842
1974	1.7747298229923132
1975	1.7316214763960716
1976	1.570483285810269
1977	1.5117986156879795
1978	1.3541038611465126
1979	1.2118483227991987
1980	1.206855445389209
1981	1.2307376745063863
1982	1.3192624888358466
1983	1.3374421182525111
1984	1.2555540417377387
1985	1.2507583083753104
1986	1.2750512853455973
1987	1.289825390794249
1988	1.261451741799192
1989	1.2073965532742648
1990	1.1975399474900712
1991	1.0897372411193373
1992	0.976740835513894
1993	0.910174414685244
1994	0.8735640950686729
1995	0.8260290194975823
1996	0.777713203714157
1997	0.7366893899130673
1998	0.687588943929569
1999	0.6268381272057013
2000	0.5742125093139521
2001	0.44276525670979083
2002	0.28642641924811585
2003	0.2188043197762397
2004	0.18046197540766684
2005	0.1316167271789226
2006	0.09003553161028321
2007	0.053361791645343715
2008	0.03525556501968197
2009	0.022678090809108653
2010	0.022399027266686744
2011	0.0749294380751877
2012	0.09451124556112234
2013	0.06758633349430454
2014	0.019878780448507882
2015	-0.02768928905449286
2016	-0.06110603076349719
2017	-0.08226430355843206
2018	-0.13345067299736968
2019	-0.1887974179354046
2020	-0.24092085655901485
2021	-0.33023673668780873
2022	-0.4751355701595372
2023	-0.400108039857372