Year	Percent
1985	0.08417
1986	17.70686
1987	7.87458
1988	9.43012
1989	4.71903
1990	2.602
1991	0.62417
1992	0.23748
1993	2.30175
1994	3.76234
1995	3.90586
1996	7.16389
1997	7.91045
1998	12.68087
1999	12.80519
2000	4.46434
2001	4.45762
2002	4.89728
2003	5.30566
2004	4.14717
2005	4.81899
2006	6.58539
2007	6.3331
2008	8.71988
2009	1.10878
2010	8.39514
2011	3.92312
2012	5.40509
2013	3.72013
2014	4.29736
2015	-4.0702