Year	Number
2004-01-01	0.0202
2005-01-01	0.0282
2006-01-01	0.0336
2007-01-01	0.0417
2008-01-01	0.1103
2009-01-01	0.1318
2010-01-01	0.1264
2011-01-01	0.1803
2012-01-01	0.2220
2013-01-01	0.2193
2014-01-01	0.2125
2015-01-01	0.2139
2016-01-01	0.2125