Year	Measure
2000	0.741
2001	0.746
2002	0.751
2003	0.754
2004	0.756
2005	0.758
2006	0.765
2007	0.767
2008	0.77
2009	0.77
2010	0.77
2011	0.775
2012	0.779
2013	0.782
2014	0.783
2015	0.788