Year	Number
2006-01-01	2.8938
2007-01-01	2.4778
2008-01-01	2.8721
2009-01-01	3.2088
2010-01-01	4.8900
2011-01-01	4.5198
2012-01-01	5.6525
2013-01-01	6.6391
2014-01-01	7.8196
2015-01-01	5.8213