Year	Number
2004-01-01	699107
2005-01-01	827029
2006-01-01	1402179
2007-01-01	1067170
2008-01-01	1089051
2009-01-01	1549434
2010-01-01	1792945
2011-01-01	2058157
2012-01-01	2835215
2013-01-01	3698813