Year	Number
2004-01-01	412030
2005-01-01	571454
2006-01-01	1254081
2007-01-01	1615861
2008-01-01	1844043
2009-01-01	1866144
2010-01-01	1912921
2011-01-01	1616195
2012-01-01	1669586
2013-01-01	1709523
2014-01-01	1834286
2015-01-01	1818179
2016-01-01	2032754
2017-01-01	2182760