Year	annual % growth
1971	11.584013359197513
1972	19.450418933124425
1973	19.989584711061298
1974	20.673781715673982
1975	15.798187872062684
1976	20.25263147182747
1977	-2.9902397815064887
1978	-20.017860814253154
1979	-0.39383996928222587
1980	-22.685040068871075
1981	-5.590324587344824
1982	14.619989295515666
1983	9.689790871695322
1984	-12.19272050906774
1985	0.5635855058904156
1986	-12.621135888069318
1987	-4.8761031735728295
1988	-19.984509607678092
1989	0.7956609374249553
1990	5.741180972140981
1994	-1.4254631606797403
1995	-2.7998985850342564
1996	7.281732770502103
1997	1.732150072042728
1998	-0.7755966154407474
1999	6.773516286119971
2000	0.10249378696359202
2001	11.250716402200482
2002	17.245310400840367
2003	5.088018772062156
2004	2.024000808444299
2005	8.509559224254588
2006	3.6517829303745373
2007	13.321434870525025
2008	-4.84152776516801
2009	1.702979931421794
2010	8.432046599930572
2011	1.2412688363142763
2012	-12.265489363193495
2013	-4.238530523277959
2014	-3.393536065071771
2015	-18.444132210066215
2016	17.812528750094884
2017	-1.9158783950322942
2018	-12.585492724358048
2019	-7.716082394494606
2020	4.842978728019858
2021	6.698146163083791