Year	Number
2004-01-01	0.5206
2005-01-01	1.2157
2006-01-01	1.0048
2007-01-01	1.4252
2008-01-01	1.8070
2009-01-01	3.3405
2010-01-01	6.7714
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