Year	Percent
1985	2.1777
1986	1.95079
1987	-4.23069
1988	-4.8164
1989	10.93156
1990	3.69613
1991	1.40105
1992	2.69272
1993	3.14253
1994	5.4872
1995	4.57067
1996	4.65789
1997	4.77251
1998	2.0653
1999	5.45311
2000	4.05139
2001	4.08613
2002	4.32522
2003	4.50093
2004	4.76271
2005	5.44305
2006	6.84904
2007	5.78062
2008	6.00051
2009	5.75705
2010	6.88955
2011	6.55095
2012	6.65064
2013	6.70581
2014	6.27279
2015	5.85998
2016	5.52843
2017	5.33713