Year	Number
2004-01-01	4.7042
2005-01-01	4.6977
2006-01-01	4.9209
2007-01-01	5.0375
2008-01-01	5.2122
2009-01-01	5.1424
2010-01-01	5.0324
2011-01-01	5.1566
2012-01-01	5.2001
2013-01-01	5.1923
2014-01-01	5.1885
2015-01-01	5.2343
2016-01-01	5.2345