Year	annual % growth
1971	2.1956912674010454
1972	4.404707103785
1973	4.758370789679461
1974	-3.0862022421302697
1975	-0.46185537941954635
1976	3.9554760919793495
1977	2.6212731615297855
1978	4.061198594273179
1979	0.7461723835929206
1980	-1.6250916942896083
1981	1.0768520060780702
1982	0.6516557915431775
1983	2.239125397555469
1984	4.682768045541891
1985	3.3239197479092155
1986	3.872575758524576
1987	3.113406576739351
1988	4.910525562012253
1989	2.4374188966842922
1990	1.8610196937617047
1991	0.5609295538421435
1992	1.353540344416615
1993	0.19550383687945327
1994	3.149727751893195
1995	2.6380999315398697
1996	2.57893985543582
1997	3.232442973426302
1998	3.056370086053377
1999	2.668607856806233
2000	2.9489510106915304
2001	1.1680057799353847
2002	0.8402481196856826
2003	1.3290896677740704
2004	2.8157561430847835
2005	1.8133467182930048
2006	2.508615055862066
2007	0.9336761759079195
2008	-2.774170578186826
2009	-3.197644280021194
2010	3.4403758396386053
2011	1.1146540925141863
2012	1.2910611588681036
2013	0.8898742860480127
2014	2.0290075280603617
2015	2.5873864117861984
2016	1.1896341564139732
2017	2.2151715375624264
2018	1.593109674243749
2019	1.254884753466314
2020	-5.283477116560249
2021	4.866698227731604