Year	Number
2004-01-01	1513
2005-01-01	1456
2006-01-01	1516
2007-01-01	1659
2008-01-01	1768
2009-01-01	1755
2010-01-01	1790
2011-01-01	1778
2012-01-01	1623
2013-01-01	1476
2014-01-01	1235
2015-01-01	1138
2016-01-01	1081