Year	Number
2004-01-01	0.0000
2005-01-01	0.0000
2006-01-01	0.0000
2007-01-01	0.7911
2008-01-01	2.4467
2009-01-01	2.3300
2010-01-01	2.9032
2011-01-01	5.3781
2012-01-01	6.0629
2013-01-01	5.1955
2014-01-01	5.3949
2015-01-01	7.3419
2016-01-01	9.1475