Year	Number
2004-01-01	133
2005-01-01	121
2006-01-01	115
2007-01-01	111
2008-01-01	108
2009-01-01	98
2010-01-01	95
2011-01-01	95
2012-01-01	94
2013-01-01	92
2014-01-01	92
2015-01-01	92
2016-01-01	92
2017-01-01	90