Year	Number
2004-01-01	7.0833
2005-01-01	8.0397
2006-01-01	8.6597
2007-01-01	9.2322
2008-01-01	9.5192
2009-01-01	9.3236
2010-01-01	8.1797
2011-01-01	8.4425
2012-01-01	8.6463
2013-01-01	8.6752
2014-01-01	10.0886
2015-01-01	10.3259
2016-01-01	10.2044