Year	Number
2004-01-01	0.7502
2005-01-01	1.1767
2006-01-01	1.8911
2007-01-01	2.7584
2008-01-01	3.4623
2009-01-01	3.9973
2010-01-01	4.3970
2011-01-01	4.8631
2012-01-01	5.4589
2013-01-01	6.5076
2014-01-01	7.5275
2015-01-01	8.7705
2016-01-01	9.8343