Year	Number
2004-01-01	1.9805
2005-01-01	2.2286
2006-01-01	2.7347
2007-01-01	2.6379
2008-01-01	1.2821
2009-01-01	1.3263
2010-01-01	1.5368
2011-01-01	2.6312
2012-01-01	4.8318
2013-01-01	16.5022
2014-01-01	14.0957
2015-01-01	16.9611
2016-01-01	19.5454