Year	annual % growth
1977	2.595685613574304
1978	-3.7262829650628646
1979	-2.3973699188505577
1980	-0.40376522309652785
1981	4.410963583600164
1982	-9.028876586247492
1983	-1.0174255247321753
1984	-1.0908039238073997
1985	4.6696264280048325
1986	-3.787511969240242
1987	4.533676072026921
1988	0.7657078672723401
1989	2.5062653644944106
1990	5.284975640461823
1991	5.049421551549855
1992	1.7676921338585885
1993	2.687102692654392
1994	4.3089512435245325
1995	5.55261883039833
1996	6.149528216938123
1997	5.7959465425098955
1998	6.090444372070095
1999	-2.083483517720296
2000	-1.1327072467724264
2001	3.2050033681184686
2002	3.3060000039346846
2003	2.76880955443319
2004	3.587349837208137
2005	2.052030781230357
2006	6.834855777423627
2007	4.399039651196517
2008	11.301932544276113
2009	2.1766486940045837
2010	6.415045904164401
2011	4.696449077969106
2012	2.3155058354819715
2013	5.559613435088679
2014	3.1354707386011853
2015	4.849498940070234
2016	5.3886556036038655
2017	4.333534411296824
2018	4.341854262494309
2019	2.808769981288762
2020	-8.038665441380573
2021	-0.8613957710025204