Year	Percent
1988	-2.7234
1989	8.31276
1990	-20.86036
1991	106.16092
1992	3089.15255
1993	1133.99015
1994	952.30715
1995	705.71848
1996	1014.25598
1997	61.74709
1998	17.62951
1999	23.01144
2000	23.45839
2001	32.31486
2002	25.1531
2003	27.15433
2004	18.34776
2005	7.02679
2006	12.26005
2007	9.25952
2008	59.74039
2009	9.76102
2010	2.30609
2011	12.85745
2012	8.27008
2013	1.15245
2014	0.66918
2015	-5.15352
2016	-4.83787
2017	9.92394