Year	Number
2004-01-01	1.2049
2005-01-01	1.6958
2006-01-01	2.4103
2007-01-01	3.3462
2008-01-01	4.5807
2009-01-01	5.3812
2010-01-01	7.0930
2011-01-01	8.6644
2012-01-01	10.4971
2013-01-01	11.5278
2014-01-01	13.6022
2015-01-01	12.6307
2016-01-01	12.2976