Year	Percent
2000	1.45
2001	1.53
2002	1.1
2003	0.83
2004	0.75
2005	0.6
2006	0.65
2007	0.44
2008	0.86
2009	0.86
2010	0.85
2011	0.76
2012	0.66
2013	0.64
2014	0.56
2015	0.56
2016	0.49
2017	0.52