Year	Number
2004-01-01	464443
2005-01-01	649009
2006-01-01	1325717
2007-01-01	1756374
2008-01-01	2001863
2009-01-01	2028251
2010-01-01	2108444
2011-01-01	1642511
2012-01-01	1685645
2013-01-01	1736387
2014-01-01	1923630
2015-01-01	2031012
2016-01-01	2314868
2017-01-01	2505197