Year	Number
2004-01-01	169.5744
2005-01-01	188.6423
2006-01-01	215.9686
2007-01-01	239.1611
2008-01-01	249.0987
2009-01-01	254.4910
2010-01-01	268.7364
2011-01-01	298.3663
2012-01-01	338.4413
2013-01-01	368.7815
2014-01-01	396.0715
2015-01-01	407.6623
2016-01-01	408.9493