Year	Number
2004-01-01	3.2726
2005-01-01	7.2329
2006-01-01	10.8640
2007-01-01	21.7821
2008-01-01	26.1359
2009-01-01	16.0218
2010-01-01	18.4948
2011-01-01	21.4724
2012-01-01	25.6899
2013-01-01	34.2225