Year	Number
2004-01-01	4.1859
2005-01-01	4.5506
2006-01-01	5.2140
2007-01-01	11.6410
2008-01-01	20.0408
2009-01-01	22.8951
2010-01-01	34.1697
2011-01-01	7.0031
2012-01-01	7.6365
2013-01-01	7.8620
2014-01-01	7.2084
2015-01-01	7.5598
2016-01-01	7.9111
2017-01-01	8.4290