Year	Percent
2001	0.86
2002	0.72
2003	0.8
2004	1.02
2005	1.04
2006	1.16
2007	0.89
2008	0.65
2009	0.76
2010	0.76
2011	0.77
2012	0.52
2013	0.37
2015	0.13