Year	Number
2004-01-01	66
2005-01-01	59
2006-01-01	59
2007-01-01	59
2008-01-01	59
2009-01-01	59
2010-01-01	46
2011-01-01	46
2012-01-01	46
2013-01-01	48
2014-01-01	46
2015-01-01	47