Year	Number
2004-01-01	3.9843
2005-01-01	4.6795
2006-01-01	5.3553
2007-01-01	7.0031
2008-01-01	7.8463
2009-01-01	9.1851
2010-01-01	10.7428
2011-01-01	11.4444
2012-01-01	11.9529
2013-01-01	12.5644
2014-01-01	13.4140
2015-01-01	14.5984
2016-01-01	15.3257