Year	Percent
1989	-42.62355
1990	25.29681
1991	35.71803
1992	1.9299
1993	4.08435
1994	5.32413
1995	4.47146
1996	3.85041
1997	-2.97272
1998	2.88468
1999	-1.79949
2000	-1.12175
2001	0.02251
2002	-1.36922
2003	-1.75888
2004	1.47784
2005	-0.45223
2006	-0.2081
2007	8.57039
2008	9.81332
2009	8.15736
2010	4.20152
2011	-4.60785
2012	-4.05514
2013	-4.36099
2014	-3.95306
2015	-3.4607
2016	-0.63528
2017	0.75128