Year	Number
2004-01-01	4.8415
2005-01-01	4.8485
2006-01-01	16.2819
2007-01-01	18.1928
2008-01-01	20.3011
2009-01-01	17.6727
2010-01-01	6.0999
2011-01-01	5.7684
2012-01-01	5.5225
2013-01-01	5.7943
2014-01-01	6.0696
2015-01-01	5.9976
2016-01-01	5.2695