Year	Number
2004-01-01	1.1215
2005-01-01	1.1730
2006-01-01	1.1798
2007-01-01	1.3654
2008-01-01	2.0113
2009-01-01	2.3237
2010-01-01	2.4180
2011-01-01	2.3467
2012-01-01	2.6434
2013-01-01	2.8310
2014-01-01	2.9151
2015-01-01	2.9013
2016-01-01	2.7711