Year	Number
2004-01-01	77
2005-01-01	77
2006-01-01	79
2007-01-01	72
2008-01-01	78
2009-01-01	125
2010-01-01	136
2011-01-01	145
2012-01-01	152
2013-01-01	156
2014-01-01	150
2015-01-01	159
2016-01-01	154