Year	%
1986	31.899078880184103
1987	6.7961615308152785
1988	5.676506992594716
1989	4.267214334140524
1990	3.419726616282275
1991	11.474869606827323
1992	15.81804495216002
1993	14.294301820599907
1994	3.150139609378705
1995	10.49670124261281
1996	12.099824354446243
1997	11.160944163977483
1998	20.284863790650594
1999	8.842680723649007
2000	-2.378906722444154
2001	14.54559466507498
2002	4.8273614940424565
2003	-0.2830273540563635
2004	-2.781093221033499
2005	-5.199029249132463
2006	-0.796745563030568
2007	-0.15612028199142688
2008	-2.821019813816998
2009	24.061967721618032
2010	-0.1802158759193059
2011	-2.6845337307455424
2012	2.9318458603341795
2013	5.529618512041174
2014	7.667328425130144
2015	16.032283351325255