Year	Percent
1986	-4.029
1987	5.823
1988	-2.57442
1989	7.26278
1990	6.28991
1991	99.63351
1992	574.01451
1993	1207.21105
1994	221.04771
1995	346.00032
1996	430.55281
1997	65.23068
1998	87.82765
1999	26.50724
2000	22.66785
2001	30.20817
2002	18.81846
2003	26.99111
2004	17.51852
2005	9.51573
2006	21.06351
2007	27.23701
2008	28.16376
2009	12.23425
2010	12.46167
2011	13.32436
2012	11.86852
2013	4.34698
2014	5.46374
2015	0.1243
2016	5.27584
2017	4.72252