Year	Number
2004-01-01	49.1743
2005-01-01	61.0663
2006-01-01	60.0776
2007-01-01	57.5679
2008-01-01	64.0481
2009-01-01	65.8839
2010-01-01	69.0816
2011-01-01	70.7744
2012-01-01	72.3891
2013-01-01	76.6913
2014-01-01	74.1160
2015-01-01	71.6342
2016-01-01	65.3509
2017-01-01	64.0439