Year	Number
2004-01-01	4.2251
2005-01-01	9.2575
2006-01-01	13.8688
2007-01-01	19.3616
2008-01-01	28.6265
2009-01-01	32.9414
2010-01-01	34.1368
2011-01-01	35.2645
2012-01-01	35.6792
2013-01-01	35.3069
2014-01-01	34.5531
2015-01-01	34.9792
2016-01-01	33.8068