Year	Number
2004-01-01	6.0964
2005-01-01	5.7990
2006-01-01	5.5675
2007-01-01	4.8755
2008-01-01	4.3902
2009-01-01	3.6679
2010-01-01	3.1924
2011-01-01	2.0986
2012-01-01	1.7072
2013-01-01	1.5627
2014-01-01	1.2037
2015-01-01	0.8921
2016-01-01	0.8561