Year	Percent
1989	72.99646
1990	15.50185
1991	51.53849
1992	119.98929
1993	29.10213
1994	13.80037
1995	10.58957
1996	7.68877
1997	15.36162
1998	4.0913
1999	0.73942
2000	-2.0901
2001	-1.5551
2002	4.92935
2003	1.5858
2004	-1.48258
2005	-1.11585
2006	0.82082
2007	3.117
2008	7.64627
2009	10.29382
2010	0.23774
2011	3.36187
2012	6.47841
2013	2.19696
2014	1.91231
2015	2.56259
2016	-1.68421
2017	2.45716