Year	Number
2004-01-01	7.1978
2005-01-01	7.2832
2006-01-01	6.8731
2007-01-01	16.4765
2008-01-01	15.6090
2009-01-01	16.5966
2010-01-01	16.4518
2011-01-01	16.5725
2012-01-01	19.8882
2013-01-01	21.3966
2014-01-01	25.4690
2015-01-01	26.4857
2016-01-01	30.0319