Year	annual % growth
1971	-8.154889380621157
1972	-9.445776515514439
1973	14.77243768495677
1974	35.4293032699656
1975	-21.58364754215792
1976	23.91509549337249
1977	12.835854528891417
1978	13.711222010519307
1979	-7.2330985672577555
1980	8.024351508926173
1981	18.146696523126153
1982	-3.3276348501591144
1983	8.107478509259394
1984	29.50473455193682
1985	-15.602994323077894
1986	-10.569956080742699
1987	4.0336925942398665
1988	22.387143580690875
1989	2.353189952985261
1990	11.924835983401309
1991	24.222989196068553
1992	2.725107644075436
1993	20.24626098794195
1994	7.6318243316119805
1995	18.724714191089987
1996	8.941810694438956
1997	9.578385980659363
1998	-10.629714572947364
1999	8.342314945602581
2000	11.092502618126247
2001	-5.697037711837979
2002	16.262948998969293
2003	3.5128698855066034
2004	15.13374063543364
2005	1.1861020706730727
2006	10.573549876473251
2007	10.213688531789458
2008	7.470463227233594
2009	-6.622003937771041
2010	11.892979786832854
2011	7.77886079843195
2012	2.9115429050849997
2013	1.648695509677367
2014	2.460930869925292
2015	8.153847140816083
2016	4.2741537896768165
2017	5.02398602772935
2018	2.3741650753923835
2019	6.9986026565929365
2020	-3.7170135956576758
2021	0.6733189801981752