Year	Number
2004-01-01	841157
2005-01-01	1324703
2006-01-01	1944473
2007-01-01	2633718
2008-01-01	2976634
2009-01-01	2820114
2010-01-01	2904398
2011-01-01	3168145
2012-01-01	3730142
2013-01-01	4063828
2014-01-01	4314721
2015-01-01	4364022
2016-01-01	4356690
2017-01-01	4572568