Year	Percent
2000	1.73
2001	1.55
2002	1.7
2003	2.02
2004	2.15
2005	1.54
2006	1.28
2007	1.17
2008	1.01
2009	1.02
2010	1.04
2011	1.02
2012	0.83
2013	0.67
2014	0.69
2015	0.64
2016	0.61
2017	0.78