Year	Number
2004-01-01	45.6093
2005-01-01	45.9127
2006-01-01	50.1705
2007-01-01	60.7815
2008-01-01	68.0860
2009-01-01	71.6737
2010-01-01	75.5262
2011-01-01	68.3029
2012-01-01	72.9378
2013-01-01	68.5285
2014-01-01	62.8955
2015-01-01	63.0397
2016-01-01	62.0473