Year	Number
2004-01-01	1.6302
2005-01-01	1.5954
2006-01-01	2.9561
2007-01-01	4.7102
2008-01-01	5.9947
2009-01-01	7.2721
2010-01-01	8.9092
2011-01-01	9.1043
2012-01-01	9.5103
2013-01-01	9.6003
2014-01-01	9.7499
2015-01-01	9.8100
2016-01-01	9.2712