Year	Number
2004-01-01	0.5871
2005-01-01	0.6325
2006-01-01	0.7030
2007-01-01	0.8399
2008-01-01	0.9459
2009-01-01	1.5925
2010-01-01	2.3790
2011-01-01	3.3439
2012-01-01	3.1106
2013-01-01	9.9641
2014-01-01	10.5775
2015-01-01	10.2600
2016-01-01	9.4643
2017-01-01	9.5800