Year	Number
2004-01-01	0.5248
2005-01-01	0.7160
2006-01-01	0.6773
2007-01-01	0.7626
2008-01-01	0.6411
2009-01-01	0.8608
2010-01-01	0.9203
2011-01-01	1.2072
2012-01-01	2.5514
2013-01-01	2.7323
2014-01-01	2.9857
2015-01-01	1.2330
2016-01-01	1.2873