Year	Number
2004-01-01	2.7371
2005-01-01	3.6801
2006-01-01	3.4226
2007-01-01	3.7875
2008-01-01	3.1273
2009-01-01	4.1215
2010-01-01	4.3219
2011-01-01	5.5491
2012-01-01	11.4690
2013-01-01	12.0035
2014-01-01	12.8118
2015-01-01	5.1654
2016-01-01	5.2601