Year	Number
2005-01-01	13.8254
2006-01-01	22.2680
2007-01-01	34.2699
2008-01-01	41.2424
2009-01-01	45.0790
2010-01-01	47.3775
2011-01-01	47.1947
2012-01-01	46.5983
2013-01-01	44.8905
2014-01-01	44.3566
2015-01-01	45.7485
2016-01-01	50.6643
2017-01-01	45.6030