Year	Number
2004-01-01	29.8093
2005-01-01	32.2238
2006-01-01	33.3351
2007-01-01	35.8889
2008-01-01	39.8446
2009-01-01	39.1126
2010-01-01	39.5126
2011-01-01	42.3599
2012-01-01	42.7277
2013-01-01	43.3964
2014-01-01	45.1410
2015-01-01	27.5445
2016-01-01	27.2237
2017-01-01	26.8896