Year	Number
2004-01-01	0.6337
2005-01-01	0.8258
2006-01-01	0.9869
2007-01-01	1.0752
2008-01-01	1.3401
2009-01-01	1.4439
2010-01-01	1.5790
2011-01-01	1.7400
2012-01-01	1.8802
2013-01-01	1.9010
2014-01-01	1.9789
2015-01-01	2.1815
2016-01-01	2.2646