Year	annual % growth
1972	11.0712590605835
1973	6.87380752101265
1974	3.60553467096429
1975	7.80965043919623
1976	3.20021819493263
1977	5.83119840166992
1978	8.14687196423525
1979	7.55579399797732
1980	3.0586771929769
1981	6.47929534411682
1982	7.26940990485036
1983	12.4209148909645
1984	9.31567260391675
1985	-0.651604872594561
1986	0.438679606773292
1987	5.98149088633213
1988	13.9282830140242
1989	10.6802412040452
1990	11.5181279904214
1991	7.94112287747102
1992	6.34179199636431
1993	8.56275081046059
1994	15.0097025306525
1995	11.1005063858324
1996	5.74770357048158
1997	10.9087941167247
1998	-5.21744043426425
1999	3.58018306196199
2000	12.9067676723021
2001	-3.89607485559418
2002	2.62705340400203
2003	2.27737652728415
2004	8.04120613753507
2005	10.0390914160598
2006	13.42191324405
2007	10.552609111453
2008	-6.66647431815666
2009	-0.728297459121535
2010	24.5816119178465
2011	2.96216448226012
2012	0.423146985611538
2013	3.5967076251104
2014	4.05179715846657
2015	3.80182943011262
2016	0.695673177348581
2017	5.49977711065159