Year	Number
2004-01-01	29.0259
2005-01-01	28.3177
2006-01-01	26.4310
2007-01-01	26.3839
2008-01-01	26.0340
2009-01-01	25.4199
2010-01-01	24.7070
2011-01-01	24.0646
2012-01-01	22.0880
2013-01-01	25.1411