Year	Number
2004-01-01	30.9267
2005-01-01	33.8544
2006-01-01	34.9329
2007-01-01	38.9650
2008-01-01	38.0640
2009-01-01	39.5095
2010-01-01	40.8811
2011-01-01	43.4268
2012-01-01	44.3240
2013-01-01	44.8747
2014-01-01	45.0395
2015-01-01	45.5950
2016-01-01	44.5067