Year	Number
2005-01-01	8.3605
2006-01-01	7.6896
2007-01-01	2.1722
2008-01-01	3.0373
2009-01-01	5.1299
2010-01-01	18.4836
2011-01-01	17.0395
2012-01-01	16.6765
2013-01-01	16.2236
2014-01-01	16.9169
2015-01-01	16.5586
2016-01-01	14.6453
2017-01-01	14.5607