Year	Number
2004-01-01	43.0140
2005-01-01	40.8992
2006-01-01	33.8495
2007-01-01	33.1144
2008-01-01	33.1297
2009-01-01	32.1678
2010-01-01	31.8616
2011-01-01	31.5842
2012-01-01	28.3554
2013-01-01	29.8670
2014-01-01	29.3265
2015-01-01	28.5727
2016-01-01	27.7157
2017-01-01	26.5606