Year	Number
2004-01-01	5.1200
2005-01-01	6.7509
2006-01-01	7.8919
2007-01-01	9.6249
2008-01-01	12.6325
2009-01-01	12.1115
2010-01-01	12.2627
2011-01-01	12.8788
2012-01-01	13.7557
2013-01-01	14.5923
2014-01-01	17.7827
2015-01-01	18.9616
2016-01-01	16.5547
2017-01-01	19.8365