Year	Number
2004-01-01	0.7757
2005-01-01	0.8408
2006-01-01	0.8758
2007-01-01	1.0510
2008-01-01	1.6065
2009-01-01	1.9268
2010-01-01	2.0746
2011-01-01	2.0896
2012-01-01	2.4436
2013-01-01	2.7179
2014-01-01	2.9074
2015-01-01	3.0072
2016-01-01	2.9822