Year	Number
2004-01-01	0.4067
2005-01-01	0.5227
2006-01-01	8.5682
2007-01-01	13.0002
2008-01-01	13.5074
2009-01-01	15.1144
2010-01-01	18.9019
2011-01-01	31.7318
2012-01-01	35.7304
2013-01-01	42.0925
2014-01-01	34.9860