Year	Percent
1992	0.06954
1993	0.36644
1994	0.56593
1995	-0.17977
1996	0.64521
1997	1.13126
1998	0.93135
1999	0.70967
2000	0.54286
2001	0.72623
2002	0.67403
2003	0.81555
2004	1.46799
2005	1.33916
2006	1.00284
2007	3.16072
2008	2.40715
2009	2.49932
2010	4.16052
2011	3.56123
2012	1.0865
2013	1.10018
2014	1.20088
2015	0.09938
2016	0.19888
2017	0.19657