Year	Number
2004-01-01	0.3856
2005-01-01	0.9500
2006-01-01	0.7392
2007-01-01	1.0950
2008-01-01	1.4325
2009-01-01	2.9433
2010-01-01	5.9702
2011-01-01	8.9564
2012-01-01	10.2622
2013-01-01	14.6140
2014-01-01	34.1729
2015-01-01	35.1530
2016-01-01	29.1019
2017-01-01	20.1396