Year	annual % growth
1971	0.191291848184761
1972	4.38853442763185
1973	5.23120771920283
1974	0.832241146762925
1975	2.69296427859143
1976	0.190483786180764
1977	0.339077179511207
1978	0.672554486691766
1979	0.70788027506832
1980	2.38437891547383
1981	3.17577472583805
1982	0.422504227505115
1983	-0.510652328523491
1984	3.16453890194714
1985	0.602755536517009
1986	1.08676937748298
1987	0.374105054461268
1988	5.47846020307317
1989	3.15410179583733
1990	-0.0561482909737521
1991	-1.61481840016756
1992	-1.04068027322246
1993	3.66122441662196
1994	3.15663139402646
1995	2.14507590208608
1996	3.58437488883013
1997	3.47778196976303
1998	3.52548302139768
1999	2.89328115612034
2000	2.11958080268676
2001	2.08806178833581
2002	3.24922718685363
2003	2.19140875259116
2004	3.96462123552703
2005	1.02928053041049
2006	2.00092503526284
2007	3.33358042610921
2008	2.94399831527457
2009	3.90813679294362
2010	-0.158668441260843
2011	4.474360461891
2012	3.73633857351332
2013	-1.37946452859187
2014	-0.444336647970744
2015	-1.13524338065267
2016	-1.20479953584245
2017	2.78213060126708