Year	Number
2004-01-01	194
2005-01-01	194
2006-01-01	189
2007-01-01	172
2008-01-01	154
2009-01-01	148
2010-01-01	135
2011-01-01	130
2012-01-01	145
2013-01-01	134
2014-01-01	131
2015-01-01	120
2016-01-01	115
2017-01-01	100