Year	Number
2004-01-01	28.8391
2005-01-01	30.7221
2006-01-01	30.7660
2007-01-01	32.6671
2008-01-01	34.3629
2009-01-01	35.6782
2010-01-01	35.1755
2011-01-01	35.9276
2012-01-01	35.6191
2013-01-01	34.6534
2014-01-01	33.9137
2015-01-01	33.6006
2016-01-01	32.8607