Year	Number
2004-01-01	1.6802
2005-01-01	2.3237
2006-01-01	3.1013
2007-01-01	4.4240
2008-01-01	5.7825
2009-01-01	7.0337
2010-01-01	7.5521
2011-01-01	10.2243
2012-01-01	10.7695
2013-01-01	11.6454
2014-01-01	11.8688
2015-01-01	12.5480
2016-01-01	13.2183