Year	Number
2004-01-01	1.5479
2005-01-01	1.5479
2006-01-01	1.5479
2007-01-01	1.5479
2008-01-01	1.6003
2009-01-01	1.6528
2010-01-01	1.8889
2011-01-01	2.2037
2012-01-01	1.7315
2013-01-01	2.2824
2014-01-01	2.2562
2015-01-01	2.2824
2016-01-01	2.3349