Year	Number
2004-01-01	2.2213
2005-01-01	2.4388
2006-01-01	2.7022
2007-01-01	3.1932
2008-01-01	3.5731
2009-01-01	4.3587
2010-01-01	5.2629
2011-01-01	6.6415
2012-01-01	8.4412
2013-01-01	13.6572
2014-01-01	10.4136
2015-01-01	14.9994
2016-01-01	13.5890