Year	Number
2004-01-01	752
2005-01-01	769
2006-01-01	778
2007-01-01	1302
2008-01-01	1402
2009-01-01	1500
2010-01-01	1542
2011-01-01	1607
2012-01-01	1678
2013-01-01	1781
2014-01-01	1821
2015-01-01	1875