Year	Number
2004-01-01	0.6561
2005-01-01	0.9068
2006-01-01	0.8947
2007-01-01	0.7249
2008-01-01	0.6811
2009-01-01	0.6295
2010-01-01	0.6361
2011-01-01	0.8352
2012-01-01	0.8698
2013-01-01	1.3285
2014-01-01	1.9252
2015-01-01	3.4275
2016-01-01	4.4095