Year	Number
2004-01-01	412749
2005-01-01	440259
2006-01-01	502809
2007-01-01	502810
2008-01-01	633942
2009-01-01	689493
2010-01-01	666363
2011-01-01	1209098
2012-01-01	971466
2013-01-01	903168
2014-01-01	928113