Year	Number
2004-01-01	2.5802
2005-01-01	2.5333
2006-01-01	2.5833
2007-01-01	3.5541
2008-01-01	3.5397
2009-01-01	4.6620
2010-01-01	5.1531
2011-01-01	7.3169
2012-01-01	8.3367
2013-01-01	8.2542
2014-01-01	8.3613
2015-01-01	8.8062
2016-01-01	9.5802