Year	Number
2004-01-01	146
2005-01-01	150
2006-01-01	155
2007-01-01	160
2008-01-01	169
2009-01-01	186
2010-01-01	189
2011-01-01	193
2012-01-01	198
2013-01-01	202
2014-01-01	204
2015-01-01	198
2016-01-01	186