Year	Number
2004-01-01	3.0622
2005-01-01	3.2293
2006-01-01	3.5979
2007-01-01	4.5625
2008-01-01	4.7675
2009-01-01	5.0957
2010-01-01	5.3610
2011-01-01	5.3783
2012-01-01	5.6665
2013-01-01	5.8250
2014-01-01	6.0466
2015-01-01	7.1201
2016-01-01	7.1283