Year	Number
2004-01-01	30848
2005-01-01	45275
2006-01-01	43304
2007-01-01	52802
2008-01-01	56697
2009-01-01	51559
2010-01-01	47327
2011-01-01	43561
2012-01-01	66697
2013-01-01	115884
2014-01-01	118374
2015-01-01	159061
2016-01-01	227707