Year	Number
2004-01-01	138
2005-01-01	139
2006-01-01	148
2007-01-01	144
2008-01-01	197
2009-01-01	266
2010-01-01	276
2011-01-01	238
2012-01-01	252
2013-01-01	253
2014-01-01	313