Year	Number
2004-01-01	4.6338
2005-01-01	5.3101
2006-01-01	6.3606
2007-01-01	7.7277
2008-01-01	9.8863
2009-01-01	9.3251
2010-01-01	9.4834
2011-01-01	10.4475
2012-01-01	12.2751
2013-01-01	14.3474
2014-01-01	14.1027
2015-01-01	13.9732
2016-01-01	14.1747