Year	Number
2005-01-01	1.1775
2006-01-01	1.1571
2007-01-01	1.3136
2008-01-01	1.7663
2009-01-01	1.8696
2010-01-01	1.9851
2011-01-01	2.0511
2012-01-01	2.1899
2013-01-01	2.4409
2014-01-01	2.4350
2015-01-01	2.4585