Year	Number
2004-01-01	7.7135
2005-01-01	7.2417
2006-01-01	5.8494
2007-01-01	5.6805
2008-01-01	5.6082
2009-01-01	6.3127
2010-01-01	4.5449
2011-01-01	8.9074
2012-01-01	9.8950
2013-01-01	10.8241
2014-01-01	9.6818
2015-01-01	10.3255
2016-01-01	11.4482