Year	Number
2004-01-01	1266787
2005-01-01	1395317
2006-01-01	1347674
2007-01-01	1545930
2008-01-01	1701852
2009-01-01	1790992
2010-01-01	1673898
2011-01-01	1745246
2012-01-01	1476139
2013-01-01	1643182
2014-01-01	1657743
2015-01-01	2295738
2016-01-01	2525137
2017-01-01	3094634