Year	Number
2004-01-01	3141063
2005-01-01	3369276
2006-01-01	3772116
2007-01-01	4243914
2008-01-01	4308820
2009-01-01	5660486
2010-01-01	6562322
2011-01-01	7590547
2012-01-01	8892052
2013-01-01	10119327
2014-01-01	11453253
2015-01-01	12725177
2016-01-01	14028775
2017-01-01	15332420