Year	Number
2004-01-01	27.5030
2005-01-01	27.6303
2006-01-01	28.8195
2007-01-01	31.1080
2008-01-01	34.3976
2009-01-01	34.7101
2010-01-01	33.8938
2011-01-01	34.3467
2012-01-01	35.8631
2013-01-01	34.8388
2014-01-01	34.8248
2015-01-01	32.8783
2016-01-01	32.7672