Year	Number
2006-01-01	10968.25
2007-01-01	10919.25
2008-01-01	10561.75
2009-01-01	5679.25
2010-01-01	5537.75
2011-01-01	5185.50
2012-01-01	4955.50
2013-01-01	4490.50
2014-01-01	4292.25
2015-01-01	4429.00
2016-01-01	4853.25
2017-01-01	5085.50