Year	annual % growth
1977	-8.87124586271277
1978	27.765293106093
1979	36.2990207035938
1980	-1.35394975997724
1981	12.1472675054431
1982	-8.52754947017768
1983	-6.04552333347733
1984	18.7534818720789
1985	-3.35254375364656
1986	4.56445179961271
1987	12.8653880143106
1988	1.10900574766022
1989	-2.57224846720349
1990	-19.4289021044079
1991	-6.21459541267326
1992	0.599452029752044
1993	6.23623649970624
1994	11.5013986886592
1995	8.57106331168839
1996	3.53006570371998
1997	8.96056580904208
1998	-1.09071132500861
1999	2.37054299314468
2000	1.19267830224
2001	1.14809969413041
2002	3.95115181411381
2003	2.41934907154413
2004	-4.18691456589687
2005	-2.46347327799232
2006	15.1766773622131
2007	7.41505801281959
2008	23.5897985370822
2009	22.1349804115775
2010	-13.9463597365628
2011	1.60443372011369
2012	-0.897363661312582
2013	-1.72426672681362
2014	1.84569123557436
2015	4.22201994354243
2016	-2.99165453987074
2017	3.25001116977799
2018	0.134830990018301