Year	Number
2004-01-01	45345
2005-01-01	57807
2006-01-01	67981
2007-01-01	76628
2008-01-01	83120
2009-01-01	101492
2010-01-01	145305
2011-01-01	160724
2012-01-01	194891
2013-01-01	157443
2014-01-01	176139
2015-01-01	189293