Year	Number
2004-01-01	59.3755
2005-01-01	55.8589
2006-01-01	60.7208
2007-01-01	63.6951
2008-01-01	64.0907
2009-01-01	62.5192
2010-01-01	57.7860
2011-01-01	56.5150
2012-01-01	54.5492
2013-01-01	52.9734
2014-01-01	53.6376
2015-01-01	49.6684
2016-01-01	47.5525