Year	annual % growth
1972	0.550277064706322
1973	10.7430630581591
1974	-0.0326070508293981
1975	-0.27108474230306
1976	7.29352298221269
1977	8.93169588196392
1978	9.85632402512466
1979	0.796370747153844
1980	-2.00734866599662
1981	2.63875368348056
1982	1.43326174041567
1983	4.97390894604671
1984	3.95637813570085
1985	-0.270645716392323
1986	1.9746720742732
1987	9.73057781656709
1988	12.9936935282468
1989	10.2073304069998
1990	7.62311784007321
1991	7.59717057866101
1992	7.77170335287407
1993	9.91862147723599
1994	6.26539478594145
1995	7.17875497303689
1996	2.21570292719677
1997	-8.85698026476292
1998	-15.2349239192871
1999	3.08071951547876
2000	1.57307588482337
2001	-1.22600141512218
2002	8.35809401749295
2003	6.09703348479671
2004	6.05554713729475
2005	2.42109067116073
2006	5.57873356255394
2007	5.7862675187948
2008	-2.40194854217573
2009	0.720010284395897
2010	7.04319406966663
2011	0.0352056197173738
2012	2.16877340543719
2013	0.130282565589425
2014	0.784597619179323
2015	5.87003192693332
2016	3.63226100128564
2017	3.07020684256926