Year	Number
2004-01-01	1.2939
2005-01-01	1.6776
2006-01-01	2.2814
2007-01-01	2.8540
2008-01-01	3.4808
2009-01-01	4.2222
2010-01-01	4.8430
2011-01-01	5.2820
2012-01-01	6.0264
2013-01-01	6.5177
2014-01-01	7.3233
2015-01-01	8.4695