Year	Number
2004-01-01	31100
2005-01-01	32367
2006-01-01	33633
2007-01-01	33979
2008-01-01	33282
2009-01-01	34996
2010-01-01	33666
2011-01-01	41892
2012-01-01	41126
2013-01-01	39695
2014-01-01	45935
2015-01-01	44813
2016-01-01	36953