Year	Number
2004-01-01	1.3657
2005-01-01	1.3746
2006-01-01	1.4722
2007-01-01	1.4633
2008-01-01	1.9865
2009-01-01	2.5984
2010-01-01	2.7137
2011-01-01	2.4299
2012-01-01	2.5541
2013-01-01	2.5630
2014-01-01	3.0951