Year	annual % growth
1977	26.8608840001588
1978	6.839441038319
1979	34.1551533318098
1980	7.39256308727263
1981	21.202635153184
1982	-7.71197857053545
1983	-9.04968833967393
1984	11.157380730999
1985	-7.39675995346572
1986	-19.6967288709361
1987	30.2649149270377
1988	9.5530977454698
1989	9.6214755658977
1990	-7.64146441717077
1991	-26.777474897219
1992	22.3493759757915
1993	4.96473219785902
1994	0.708672420768735
1995	1.88124075839724
1996	2.84070884431658
1997	-3.26925014702854
1998	-1.23501048207937
1999	-0.079709665652075
2000	14.3447650141954
2001	1.26722095837795
2002	3.44238819107674
2003	0.331531648489673
2004	20.5284225750706
2005	17.201393958363
2006	3.47158538014682
2007	6.44771532398367
2008	3.08925086410925
2009	-15.2506124898754
2010	-6.23599545223291
2011	4.60892363551373
2012	4.73574891203474
2013	-0.667992915978743
2014	-1.33387897219801
2015	-7.57484674599904
2016	-7.24334923021605
2017	5.70325809171695
2018	-0.78276065519357