Year	Number
2004-01-01	33.6128
2005-01-01	28.0720
2006-01-01	27.6963
2007-01-01	28.6576
2008-01-01	27.5722
2009-01-01	25.2253
2010-01-01	23.0152
2011-01-01	21.3045
2012-01-01	19.6461
2013-01-01	17.3493
2014-01-01	14.7387
2015-01-01	13.9914
2016-01-01	12.4552