Year	Number
2004-01-01	2205116
2005-01-01	627009
2007-01-01	1156183
2008-01-01	1485952
2009-01-01	1592559
2010-01-01	1656063
2011-01-01	1744754
2012-01-01	1797532
2013-01-01	1858389
2014-01-01	1911503
2015-01-01	1941631
2016-01-01	1952192