Year	annual % growth
1977	10.2818437008758
1978	21.6699989136301
1979	26.5909005420766
1980	5.05689796851378
1981	5.12962095454613
1982	5.83687574027397
1983	0.565479320980259
1984	11.8449112556619
1985	3.56238415073722
1986	-3.62221756428889
1987	7.63431711585432
1988	-2.9537741322667
1989	-3.86999099505326
1990	-12.0244485231498
1991	-11.5986317684151
1992	20.7176554989908
1993	0.500899424972488
1994	4.2402316785134
1995	2.08581556666358
1996	7.0064569250623
1997	6.49301299112055
1998	4.90521479378843
1999	2.49105313888455
2000	10.9975775927577
2001	4.24691661273633
2002	0.0815541852787334
2003	1.2679728612746
2004	7.15723681929809
2005	11.0034170386409
2006	7.27399860813777
2007	9.2313275329312
2008	11.2802430596358
2009	1.42421256613237
2010	-9.33475423575469
2011	6.2483602636446
2012	8.00736885113645
2013	7.09329112121431
2014	-0.368655548554557
2015	4.08768331683564
2016	-0.27500498092013
2017	3.84099462303223
2018	-1.00138178966634