Year	Number
2004-01-01	6.7089
2005-01-01	8.2256
2006-01-01	15.4756
2007-01-01	26.2066
2008-01-01	37.2734
2009-01-01	37.9963
2010-01-01	38.3297
2011-01-01	49.8041
2012-01-01	38.7989
2013-01-01	44.5792
2014-01-01	63.3361
2015-01-01	43.7943