Year	Number
2004-01-01	181414
2005-01-01	203027
2006-01-01	228220
2007-01-01	285456
2008-01-01	411804
2009-01-01	457993
2010-01-01	1270129
2011-01-01	645399
2012-01-01	688578
2013-01-01	784206
2014-01-01	822262
2015-01-01	1037896
2016-01-01	1055483
2017-01-01	1203835