Year	Number
2004-01-01	250
2005-01-01	247
2006-01-01	242
2007-01-01	224
2008-01-01	207
2009-01-01	204
2010-01-01	192
2011-01-01	188
2012-01-01	203
2013-01-01	194
2014-01-01	193
2015-01-01	179
2016-01-01	175
2017-01-01	163