Year	Number
2004-01-01	42.3434
2005-01-01	40.2017
2006-01-01	40.8419
2007-01-01	40.4393
2008-01-01	46.8350
2009-01-01	46.3067
2010-01-01	46.1637
2011-01-01	47.1673
2012-01-01	47.9875
2013-01-01	48.4228
2014-01-01	53.2052
2015-01-01	53.3478
2016-01-01	52.8347