Year	annual % growth
1971	2.8331654079652964
1972	5.518769185396621
1973	5.60455203731874
1974	-3.7462859407128946
1975	-0.11791853536576014
1976	5.075176455484581
1977	3.868077737556945
1978	4.938052643535201
1979	-0.5020387672076083
1980	-1.9389206350992936
1981	4.197165924601222
1982	0.8369838927858098
1983	3.2153820795461456
1984	7.889699787475848
1985	4.216797385108961
1986	3.388318135581045
1987	3.745157207824846
1988	5.693547995642817
1989	2.330288297433583
1990	1.1507006175580443
1991	0.16422733914514254
1992	3.1844172775252275
1993	2.2944582931262403
1994	4.457396527624553
1995	3.401581309108238
1996	4.130995329827812
1997	5.3342181240523985
1998	5.63386889815483
1999	4.293331816490735
2000	4.032416684620571
2001	1.4915318079722368
2002	1.5823557326720277
2003	2.013191492144756
2004	3.974937428477517
2005	2.8302540811159673
2006	3.8412677865844245
2007	0.5244382414928168
2008	-2.370516775144722
2009	-1.4880969880992012
2010	4.409189904068512
2011	2.2440325235758394
2012	3.655221930223604
2013	1.5102961439243217
2014	3.257711631946165
2015	3.0820265109524456
2016	1.0267262583084573
2017	2.885844221795523
2018	2.865459689900746
2019	2.2341978350787173
2020	-3.7280309853399984
2021	5.489901962117386