Year	Number
2004-01-01	0.0112
2005-01-01	0.0112
2006-01-01	0.0112
2007-01-01	0.0193
2008-01-01	0.0209
2009-01-01	0.0305
2010-01-01	0.0353
2011-01-01	0.0369
2012-01-01	0.0385
2013-01-01	0.0417