Year	annual % growth
1971	11.90042537190665
1972	20.706818790395843
1973	-12.78877062336612
1974	41.13398771047801
1975	8.712292556048752
1976	4.825093215352652
1977	11.694948893519893
1978	8.388399004930918
1979	3.2792932177904532
1980	8.122453130154213
1981	3.3126118273156777
1982	-4.4915305041731415
1983	-0.39032714017371006
1984	-9.078518366384813
1985	22.866772423211003
1986	-7.924254737734955
1987	17.815563829763107
1988	13.948713998208945
1989	-12.53158416895819
1990	-3.0442856121516257
1991	3.199859697232995
1992	13.794348702658027
1993	3.354891482353267
1994	-2.596924936127735
1995	7.358246293062194
1996	5.225150817602554
1997	1.0541096697849213
1998	5.3410867937679
1999	-4.123929557188177
2000	0.25294098725939307
2001	-4.025031938910644
2002	5.493363319328054
2003	11.972585691321115
2004	11.95478507861283
2005	17.196320745502902
2006	-10.412552870653428
2007	15.341891566528759
2008	11.727779490950496
2009	0.6207076355786256
2010	4.807078785587194
2011	8.898672241405976
2012	-18.69214927216325
2013	-29.843652296179613
2014	-4.675874477222138
2015	-23.487265770741274
2016	-2.902898988642221
2017	-23.324571005971322
2018	-15.793306132583368
2019	17.012041087695522
2020	-21.395549438833854
2021	25.760303319873003