Year	Percent
1981	-2.17736
1982	-0.01769
1983	-0.01675
1984	-0.02835
1985	0.3512
1986	-2.378
1987	0.00003
1988	0
1989	0
1990	-0.46871
1991	38.56834
1992	249.68344
1993	114.83565
1994	38.41649
1995	5.57331
1996	41.27559
1997	12.08871
1998	8.43237
1999	1.53333
2000	3.98129
2001	3.32885
2002	2.41059
2003	5.37972
2004	2.35708
2005	2.62102
2006	2.69605
2007	3.57619
2008	7.63032
2009	2.42005
2010	4.48992
2011	2.31004
2012	1.03999
2013	0.28997
2014	1.55
2015	0.56399
2016	-0.4814
2017	1.37489