Year	Number
2007-01-01	2.5100
2008-01-01	4.7878
2009-01-01	6.2677
2010-01-01	6.8810
2011-01-01	7.5073
2012-01-01	6.6054
2013-01-01	6.3744
2014-01-01	8.4409
2015-01-01	3.6452
2016-01-01	3.7859