Year	Number
2007-01-01	1.6959
2008-01-01	1.7178
2009-01-01	1.9444
2010-01-01	2.0249
2011-01-01	1.9444
2012-01-01	1.9481
2013-01-01	2.3940
2014-01-01	2.5475
2015-01-01	2.5877
2016-01-01	2.5877