Year	Number
2004-01-01	10600
2005-01-01	25377
2006-01-01	58636
2007-01-01	117275
2008-01-01	144301
2009-01-01	137537
2010-01-01	39592
2011-01-01	64790
2012-01-01	113311
2013-01-01	122358
2014-01-01	140187
2015-01-01	172351
2016-01-01	198358
2017-01-01	271271