Year	Number
2005-01-01	48.3708
2006-01-01	51.7223
2007-01-01	55.9659
2008-01-01	58.7898
2009-01-01	58.7510
2010-01-01	57.6106
2011-01-01	54.7324
2012-01-01	53.2040
2013-01-01	45.0737
2014-01-01	42.8704
2015-01-01	42.0869
2016-01-01	42.4438
2017-01-01	44.0652