Year	annual % growth
1971	4.282802585322699
1972	3.509245043985402
1973	5.370118634691451
1974	-0.08608962977476153
1975	-0.8898872245318188
1976	3.382472127038838
1977	2.2530982814635365
1978	5.28457186176054
1979	2.7160698184846694
1980	-0.9196446152443372
1981	-1.103321433115255
1982	1.307648481781726
1983	0.590578024179564
1984	0.45753791222082896
1985	1.9268789617758557
1986	4.782015733143737
1987	2.29590867504848
1988	4.635847782764159
1989	3.0635782812297805
1990	2.2750522854904034
1991	-0.7690033787026067
1992	1.4326779787755584
1993	-0.8768213068125448
1994	1.854007391412594
1995	1.7665908376182529
1996	1.4360065933665283
1997	2.546726218024915
1998	3.926120026757303
1999	3.6736642383550446
2000	1.8219015035149084
2001	1.3469558427105426
2002	-0.32395137870581436
2003	0.18644978958374736
2004	1.8440444456273326
2005	0.6234425163018642
2006	1.3245908652846055
2007	1.9991062135422908
2008	-0.9634872141018178
2009	-3.3381827491038365
2010	1.206856181041374
2011	1.2505721602354498
2012	-1.0436685353114825
2013	0.4943889411786131
2014	0.7912756314356102
2015	1.9930730257110838
2016	0.9871339723444663
2017	1.622589087373072
2018	0.9939167000410265
2019	1.2676959585962635
2020	-9.93720345765432
2021	8.714769680216278