Year	Number
2006-01-01	0.1409
2007-01-01	0.1494
2008-01-01	0.4603
2009-01-01	0.6608
2010-01-01	0.7992
2011-01-01	0.8417
2012-01-01	0.8308
2013-01-01	0.9158
2014-01-01	0.9875
2015-01-01	1.0349
2016-01-01	1.2244