Year	annual %
1971	2.3099109629235244
1972	1.0818429662871267
1973	33.922759383498516
1974	15.323140866277683
1975	0.06026018917948761
1976	0.3613347690333484
1977	2.4302420296201888
1978	5.62390419989265
1979	2.135328396992705
1980	-7.195222776935026
1981	6.436513121161269
1982	4.831228371565558
1983	15.508003623922946
1984	3.8660258762838424
1985	-6.2572926389872805
1986	24.5424993212562
1987	9.36375378856637
1988	7.78904676717967
1989	-1.691608811171747
1990	2.676246464458032
1991	0.08782524389536661
1992	7.140858630570278
1993	6.006240667456495
1994	5.877726957184024
1995	8.213253819247583
1996	-10.30294677068106
1997	-6.4456627964869995
1998	-0.6741226016938953
1999	-1.3347054223801535
2000	2.454427850425759
2001	6.930040653749941
2002	3.6357923165987387
2003	-1.561700550130837
2004	-0.6922791975929812
2005	1.7846914054853187
2006	0.21961463501629908
2007	3.4162794575795203
2008	-7.646274781967989
2009	3.6982191648005482
2010	5.446764505667318
2011	-0.21416588929274383
2012	-1.3088686224227928
2013	3.61044913873765
2014	-1.1575678904595605
2015	2.100519332966357
2016	2.144291103923763
2017	3.733798237579421
2018	5.65921056406313
2019	10.357829451459352
2020	-2.845981661389416
2021	1.1123009018157148
2022	-0.6755257386497675
2023	3.225998994006247