Year	Number
2004-01-01	0.9787
2005-01-01	0.9356
2006-01-01	0.9209
2007-01-01	1.9203
2008-01-01	2.1486
2009-01-01	2.2444
2010-01-01	2.8195
2011-01-01	1.0435
2012-01-01	3.1934
2013-01-01	3.1676
2014-01-01	3.1409
2015-01-01	3.1872