Year	Number
2004-01-01	1001565
2005-01-01	1277939
2006-01-01	1535093
2007-01-01	1814617
2008-01-01	2201489
2009-01-01	2283681
2010-01-01	2536807
2011-01-01	2650517
2012-01-01	2887043