Year	Number
2004-01-01	25.7646
2005-01-01	23.0082
2006-01-01	23.0645
2007-01-01	27.4648
2008-01-01	28.6161
2009-01-01	34.5745
2010-01-01	34.4315
2011-01-01	38.8798
2012-01-01	42.3697
2013-01-01	44.8207
2014-01-01	42.3578
2015-01-01	44.0490
2016-01-01	39.0652