Year	%
1980	5.117486184224884
1981	4.414200729734231
1982	1.7386796544083716
1983	4.4232584944232
1984	0.9804055269677655
1985	1.591977310928618
1986	4.418923375812217
1987	1.392216642784893
1988	6.278804872917099
1989	1.8743728369017016
1990	7.168106837337504
1991	-22.213715382313307
1992	9.543413358177023
1993	5.06684157579013
1994	6.367719543559474
1995	17.00805781993948
1996	19.775689400552107
1997	8.853672923965913
1998	5.950435648958675
1999	22.1671078554616
2000	18.083177845835863
2001	15.755375370611318
2002	13.386343910532599
2003	15.805564985853286
2004	9.07038274530279
2005	7.416376435742212
2006	8.685112483077852
2007	13.411392435212832
2008	8.686177855625404
2009	19.930464210548706
2010	-4.367361729868626
2011	-0.46599403467414663
2012	16.469090593045205
2013	11.974614793110053
2014	32.767950839880996
2015	22.891296400070722
2016	5.206243580168389
2017	15.175688117304738