Year	annual % growth
1971	0.24120386420433704
1972	2.083374491417473
1973	3.5685250507646344
1974	-0.21616973678362683
1975	4.474096329669692
1976	0.4822088796016004
1977	-3.878593996325165
1978	0.3172070966077598
1979	2.85648747112333
1980	0.9050090671184847
1981	-0.030427084361690504
1982	-0.5763317341102407
1983	0.9775367827204349
1984	5.259931013215578
1985	1.5633922395879836
1986	5.146210721312357
1987	2.899733373678842
1988	1.691547099013178
1989	1.059241840669344
1990	-1.142622833963884
1991	-1.4145307608692406
1992	-3.222136787670678
1993	-5.046714390140139
1994	6.023322276071468
1995	5.297234620875216
1996	0.5106446251396051
1997	2.3843225450583105
1998	4.282916294932846
1999	4.3808278627856225
2000	3.634146843268553
2001	-0.05931893816578793
2002	0.8956592311196658
2003	3.6696549570967676
2004	2.3746557982895524
2005	2.549922040885889
2006	5.871334308040815
2007	3.77074492634641
2008	-1.590581902850019
2009	-7.346681302970808
2010	5.807822306886749
2011	1.4248284798431712
2012	-1.2460787709383396
2013	0.31961294160096543
2014	1.6126589835592284
2015	2.463858882251486
2016	0.58012157725409
2017	1.9476643399800082
2018	0.12447084675477527
2019	2.4257096839276784
2020	-2.713299685848071
2021	4.055623066030776