Year	Number
2004-01-01	0.0356
2005-01-01	0.0711
2006-01-01	0.1067
2007-01-01	0.1422
2008-01-01	0.3556
2009-01-01	0.5690
2010-01-01	0.6046
2011-01-01	0.7468
2012-01-01	0.8179
2013-01-01	0.9246
2014-01-01	0.9246
2015-01-01	1.1735
2016-01-01	1.1735