Year	Number
2004-01-01	27910
2005-01-01	37829
2006-01-01	54437
2007-01-01	118880
2008-01-01	449056
2009-01-01	479606
2010-01-01	502730
2011-01-01	517777
2012-01-01	529835
2013-01-01	552492
2014-01-01	575494
2015-01-01	595349
2016-01-01	589079