Year	Number
2004-01-01	1.4911
2005-01-01	1.4509
2006-01-01	4.2401
2007-01-01	5.5107
2008-01-01	6.7186
2009-01-01	7.2115
2010-01-01	11.1955
2011-01-01	11.2381
2012-01-01	11.5651
2013-01-01	11.2687
2014-01-01	11.2688
2015-01-01	11.5451
2016-01-01	11.5242