Year	Number
2004-01-01	25.7537
2005-01-01	31.4384
2006-01-01	37.2093
2007-01-01	43.7554
2008-01-01	46.5978
2009-01-01	56.6753
2010-01-01	68.3032
2011-01-01	73.9018
2012-01-01	91.3867
2013-01-01	99.7416
2014-01-01	103.5314
2015-01-01	110.6804
2016-01-01	115.7623