Year	Number
2004-01-01	1.1513
2005-01-01	1.2423
2006-01-01	1.2283
2007-01-01	1.2605
2008-01-01	2.2278
2009-01-01	1.7641
2010-01-01	1.8302
2011-01-01	1.7847
2012-01-01	2.1040
2013-01-01	2.9175
2014-01-01	3.7544
2015-01-01	2.1809