Year	Number
2004-01-01	2.3387
2005-01-01	2.6952
2006-01-01	3.2442
2007-01-01	3.1162
2008-01-01	3.1910
2009-01-01	3.3753
2010-01-01	5.2189
2011-01-01	5.8126
2012-01-01	10.3346
2013-01-01	12.1854
2014-01-01	12.4927
2015-01-01	14.4636