Year	Number
2004-01-01	80
2005-01-01	79
2006-01-01	80
2007-01-01	77
2008-01-01	76
2009-01-01	71
2010-01-01	60
2011-01-01	60
2012-01-01	56
2013-01-01	51
2014-01-01	48
2015-01-01	45
2016-01-01	44
2017-01-01	40