Year	Number
2004-01-01	5.3811
2005-01-01	6.4718
2006-01-01	7.2519
2007-01-01	8.3171
2008-01-01	9.4898
2009-01-01	10.1704
2010-01-01	11.0284
2011-01-01	11.7265
2012-01-01	12.4245
2013-01-01	11.9107
2014-01-01	10.7097
2015-01-01	10.7272
2016-01-01	10.3896