Year	Percent
1986	0.49539
1987	-0.00736
1988	-0.06024
1989	-0.01884
1990	1.05432
1991	3.99801
1992	3.42868
1993	1.7172
1994	2.69418
1995	3.8812
1996	3.26192
1997	2.21742
1998	2.51488
1999	0.0417
2000	5.02348
2001	10.69522
2002	4.38931
2003	1.32036
2004	3.38378
2005	5.4089
2006	7.64247
2007	7.66273
2008	8.83464
2009	9.41637
2010	2.5455
2011	6.53924
2012	8.40754
2013	6.19599
2014	3.48807
2015	9.93441
2016	3.17892
2017	4.46035