Year	annual %
1968	0.8267548160731337
1969	2.9474510590845426
1970	0.17544604856701085
1971	2.0443834147356483
1972	-0.7598956503435801
1973	-1.063552250450826
1974	3.1178157665952426
1975	-0.06853997326406613
1976	0.5185486906493395
1977	0.3058636833777655
1978	-2.686277604534226
1979	-2.313513466320245
1980	0.6478825298209472
1981	0.9200085914136622
1982	-1.1284087563339824
1983	-1.0962581154785767
1984	-3.4154700894928425
1985	-1.9092305776365066
1986	0.06873415838384744
1987	2.4291630410187395
1988	0.9416664276591433
1989	-2.6730832263081226
1990	-5.183746664776962
1991	-1.27598585851716
1992	-2.876366778390107
1993	-2.015195474274975
1994	-1.293554473609575
1995	2.1341563704648507
1996	2.7271279095219256
1997	3.2674377506722436
1998	1.2708134886178186
1999	-0.11604972511690903
2000	0.5016148818561845
2001	1.5830973581713295
2002	1.770198016133179
2003	1.7433483011612907
2004	3.137470842127385
2005	3.557201159313081
2006	2.797538830238679
2007	3.017694487663107
2008	2.5615654266561023
2009	1.2248756501096665
2010	3.990873332880156
2011	-2.0158623387948325
2012	-5.814173568763181
2013	0.7111856146270696
2014	1.840975243974171
2015	-3.041183897690644
2016	-0.6244531643839224
2017	0.3092177817249677
2018	0.6426550327986291
2019	1.359333180310358
2020	-2.4082004449387
2021	-0.640649326551781
2022	1.0131029127480815
2023	0.26217984179064047