Year	Number
2004-01-01	462
2005-01-01	426
2006-01-01	427
2007-01-01	441
2008-01-01	424
2009-01-01	401
2010-01-01	403
2011-01-01	401
2012-01-01	377
2013-01-01	341
2014-01-01	327
2015-01-01	299
2016-01-01	232