Year	Number
2004-01-01	162
2005-01-01	163
2006-01-01	162
2007-01-01	159
2008-01-01	151
2009-01-01	150
2010-01-01	143
2011-01-01	146
2012-01-01	144
2013-01-01	143
2014-01-01	132
2015-01-01	132
2016-01-01	129