Year	Number
2004-01-01	1274
2005-01-01	1553
2006-01-01	1644
2007-01-01	1769
2008-01-01	1878
2009-01-01	1886
2010-01-01	1837
2011-01-01	1851
2012-01-01	1930
2013-01-01	2040
2014-01-01	1998
2015-01-01	2175
2016-01-01	1992
2017-01-01	1550