Year	Number
2005-01-01	219
2006-01-01	207
2007-01-01	60
2008-01-01	86
2009-01-01	85
2010-01-01	490
2011-01-01	486
2012-01-01	479
2013-01-01	479
2014-01-01	480
2015-01-01	479
2016-01-01	455
2017-01-01	455