Year	Number
2004-01-01	4.2594
2005-01-01	4.5103
2006-01-01	5.2531
2007-01-01	6.1852
2008-01-01	7.4020
2009-01-01	7.7330
2010-01-01	9.4590
2011-01-01	9.1613
2012-01-01	8.7626
2013-01-01	9.1718
2014-01-01	8.9605
2015-01-01	9.0280
2016-01-01	8.1057