Year	Number
2004-01-01	14.6667
2005-01-01	16.0000
2006-01-01	16.0000
2007-01-01	13.3333
2008-01-01	16.0000
2009-01-01	26.6667
2010-01-01	22.6667
2011-01-01	34.6667
2012-01-01	34.6667
2013-01-01	37.3333
2014-01-01	36.0000
2015-01-01	32.0000
2016-01-01	30.6667
2017-01-01	28.0000