Year	Number
2004-01-01	36.4695
2005-01-01	37.7312
2006-01-01	37.5188
2007-01-01	40.6883
2008-01-01	42.1976
2009-01-01	42.7962
2010-01-01	42.7970
2011-01-01	45.2026
2012-01-01	43.0394
2013-01-01	40.5404
2014-01-01	40.1819
2015-01-01	40.5345
2016-01-01	34.8410