Year	Measure
2000	0.3
2001	0.303
2002	0.284
2003	0.301
2004	0.306
2005	0.303
2006	0.306
2007	0.338
2008	0.343
2009	0.36
2010	0.37
2011	0.381
2012	0.387
2013	0.39
2014	0.394
2015	0.396