Year	Number
2004-01-01	9.8831
2005-01-01	10.5943
2006-01-01	11.4692
2007-01-01	12.6050
2008-01-01	14.1195
2009-01-01	19.5161
2010-01-01	20.7387
2011-01-01	21.7494
2012-01-01	22.7769
2013-01-01	23.4972
2014-01-01	23.9505
2015-01-01	24.4589
2016-01-01	24.6652
2017-01-01	24.9313