Year	annual % growth
1971	-5.487072740344175
1972	11.23183052710057
1973	11.370975750619579
1974	15.720135466604205
1975	-11.331880883632067
1976	11.227162935828488
1977	-0.8581210243551425
1978	5.1451275769263844
1979	1.6624238917804348
1980	2.735194901250253
1981	3.59055458668378
1982	14.704325509259604
1983	4.33508919382777
1984	2.45570425525257
1985	4.827685097539529
1986	6.376882243775157
1987	3.5910976211553276
1988	7.826099711870583
1989	9.287961005137475
1990	5.31712780957578
1991	8.333212848359153
1992	-0.25548175033497955
1993	5.08797134732086
1994	0.8451419590074067
1995	5.313468763278095
1996	2.9546304674619535
1997	5.755352796742997
1998	-0.19796247197568562
1999	8.847117078993747
2000	3.138220174812048
2001	1.7113449037245942
2002	-2.161858566022005
2003	-2.058455803930329
2004	17.94682580181353
2005	4.895194137890584
2006	-4.367911402353968
2007	15.150355060573702
2008	-6.593357926502236
2009	-25.594315666287443
2010	16.10742045079536
2011	3.29170002574908
2012	15.715887195876803
2013	-3.915896233426011
2014	5.998492893370425
2015	-11.430064314027831
2016	6.604977656920781
2017	11.014349283811441
2018	0.8944941569602776
2019	-5.749864445001279
2020	4.314110691665945
2021	12.268934459097352