Year	annual %
1961	2.520137050526272
1962	2.688333939344045
1963	2.7556679151129795
1964	2.8825325688681245
1965	2.8505101568738036
1966	2.834684155766039
1967	2.1247479527555164
1968	1.2748809488919899
1969	1.213607128222551
1970	2.310259988862752
1971	3.7167172912338384
1972	4.089013529913058
1973	3.4555467016949186
1974	1.424767582203952
1975	0.03892817800409319
1976	-0.07787151594027794
1977	-0.15592518751645937
1978	-0.15616869389465932
1979	-0.2608243523503151
1980	0.0652698933164495
1981	2.4619404167550654
1982	3.822121282019767
1983	3.9291412011524156
1984	3.9845908547199778
1985	4.006083534687799
1986	3.663178544137628
1987	2.8124268870861626
1988	2.735488344936693
1989	2.701279924606855
1990	2.733633716961603
1991	2.779758337739879
1992	2.829017493636103
1993	2.8375666829573603
1994	2.8684038122546567
1995	3.0980132360416825
1996	2.8152799668167354
1997	2.799730571581155
1998	2.648608629035111
1999	2.4195623747773327
2000	1.4226849525190952
2001	0.16562852596374267
2002	-0.23772658243942998
2003	-0.20937879928190997
2004	1.2568844314172096
2005	0.7041030475628184
2006	-0.01417534909170596
2007	-0.26971412475078527
2008	-0.36313187398988916
2009	-0.4790685219775027
2010	-0.582253738547077
2011	-0.7090175845958399
2012	-0.7213934443592471
2013	0.08041230010401895
2014	0.8005865176607113
2015	0.815800647636551
2016	0.908999566823076
2017	0.8584352669371165
2018	0.8651363964941199
2019	0.9618139381608456
2020	0.9526511367819787
2021	0.8960081831832211
2022	0.7529798490978479
2023	0.5660773927515955