Year	Number
2004-01-01	0.0000
2005-01-01	0.0780
2006-01-01	0.0754
2007-01-01	0.0911
2008-01-01	0.2815
2009-01-01	0.3395
2010-01-01	0.4254
2011-01-01	0.4737
2012-01-01	0.3959
2013-01-01	0.7482
2014-01-01	0.9187
2015-01-01	1.1438
2016-01-01	1.4071
2017-01-01	1.5912