Year	annual %
1977	7.56407194327318
1978	20.8364630758331
1979	9.30394580692648
1980	18.6779553072173
1981	6.06154745091776
1982	7.22378093721201
1983	0.780448780008598
1984	5.89818062821715
1985	2.83919358876767
1986	6.30594731492336
1987	1.43832489838303
1988	-4.10186283791903
1989	-13.9248964295811
1990	1.39458044831682
1991	-1.10685958186879
1992	21.2081565840986
1993	5.84070699208739
1994	5.34703776288426
1995	7.45912559986419
1996	1.97378666843355
1997	5.0053672614184
1998	4.31223704349839
1999	3.22079175354841
2000	7.88048522600111
2001	5.95416908629956
2002	4.5573039835156
2003	4.72662006414615
2004	9.32003869937449
2005	8.13264968128959
2006	8.49703639648047
2007	9.15338373369671
2008	5.90289966868076
2009	5.17378847170602
2010	-0.275289322561306
2011	2.52180240608635
2012	2.29441265142287
2013	3.08396190045907
2014	2.95269338754403
2015	2.35507421427326
2016	2.39880441512041
2017	2.38594062680437
2018	1.98486675982066