Year	Number
2004-01-01	533
2005-01-01	690
2006-01-01	812
2007-01-01	911
2008-01-01	1103
2009-01-01	1249
2010-01-01	2027
2011-01-01	1922
2012-01-01	1999
2013-01-01	2056
2014-01-01	2174
2015-01-01	2105
2016-01-01	2183