Year	Number
2004-01-01	14.3296
2005-01-01	14.8897
2006-01-01	15.7541
2007-01-01	22.1793
2008-01-01	24.3585
2009-01-01	31.2829
2010-01-01	33.1152
2011-01-01	33.9827
2012-01-01	34.5579
2013-01-01	36.2289
2014-01-01	35.4375
2015-01-01	35.3858
2016-01-01	34.4209