Year	Number
2004-01-01	5.6192
2005-01-01	5.8638
2006-01-01	6.3594
2007-01-01	6.8229
2008-01-01	7.3056
2009-01-01	7.7047
2010-01-01	8.5994
2011-01-01	8.9470
2012-01-01	9.3396
2013-01-01	9.7709
2014-01-01	10.4596
2015-01-01	10.9616
2016-01-01	11.4251