Year	Number
2004-01-01	1.3811
2005-01-01	1.4643
2006-01-01	1.5880
2007-01-01	1.8353
2008-01-01	2.4623
2009-01-01	2.7342
2010-01-01	4.3296
2011-01-01	4.3497
2012-01-01	4.5664
2013-01-01	4.4916
2014-01-01	4.6652
2015-01-01	4.9545
2016-01-01	5.0929