Year	Percent
1999	0.47
2000	0.4425
2001	1.0967
2002	1.1803
2003	1.1641
2004	1.4781
2005	0.7254
2006	0.9653
2007	1.1613
2008	0.9488
2009	1.2155
2010	1.0105
2011	1.0344
2012	0.9427
2013	0.7672
2014	0.9383
2015	0.8118
2016	0.9877
2017	1.0649