Year	Number
2004-01-01	0.8444
2005-01-01	0.8220
2006-01-01	1.0007
2007-01-01	0.9748
2008-01-01	1.1397
2009-01-01	2.2208
2010-01-01	2.8849
2011-01-01	3.1606
2012-01-01	4.1058
2013-01-01	5.1692
2014-01-01	6.9911
2015-01-01	8.4051
2016-01-01	9.6146