Year	Measure
2000	0.594
2001	0.6
2002	0.607
2003	0.613
2004	0.62
2005	0.626
2006	0.631
2007	0.644
2008	0.651
2009	0.657
2010	0.664
2011	0.673
2012	0.681
2013	0.69
2014	0.697
2015	0.701