Year	Number
2004-01-01	6.5164
2005-01-01	6.8249
2006-01-01	6.8692
2007-01-01	7.0512
2008-01-01	7.1506
2009-01-01	7.4955
2010-01-01	9.8508
2011-01-01	9.8575
2012-01-01	10.0070
2013-01-01	11.5613
2014-01-01	13.0076
2015-01-01	15.6410
2016-01-01	19.4435