Year	Number
2004-01-01	6.0575
2005-01-01	6.9433
2006-01-01	7.4169
2007-01-01	8.6049
2008-01-01	9.2050
2009-01-01	9.6027
2010-01-01	9.8865
2011-01-01	10.4069
2012-01-01	11.1642
2013-01-01	11.2335
2014-01-01	11.4118
2015-01-01	11.1653
2016-01-01	10.4476
2017-01-01	9.2641