Year	annual %
1977	4.7911184453984
1978	17.6734691984277
1979	6.21061341561173
1980	14.9412886835628
1981	2.32350448545304
1982	3.09688080882209
1983	-3.28934276249663
1984	1.59868398558982
1985	-1.25962371747484
1986	2.24274813366638
1987	-2.3349925640848
1988	-7.77581656102653
1989	-17.5400543245062
1990	-3.34148300834384
1991	-6.22458832940923
1992	14.5903402799116
1993	0.200905774797718
1994	0.359488478791661
1995	3.27948062757682
1996	-1.12906564687299
1997	2.4999216186216
1998	2.29868842522882
1999	1.41994273770291
2000	5.96967650356062
2001	4.02808817860031
2002	2.58767665445781
2003	2.48092678009093
2004	6.45562629404053
2005	4.65570047152104
2006	4.40626457368583
2007	4.55117353272647
2008	1.03782705280264
2009	0.0353432615909099
2010	-5.33296603869221
2011	-2.85092783588196
2012	-3.11359706148968
2013	-2.11290746354157
2014	-1.65971198217657
2015	-1.47252060335624
2016	-0.655448945900744
2017	0.00190539229456022
2018	0.173418392791618