Year	Number
2004-01-01	1.2608
2005-01-01	1.4953
2006-01-01	2.3736
2007-01-01	3.6993
2008-01-01	4.1793
2009-01-01	5.3014
2010-01-01	5.8958
2011-01-01	6.0697
2012-01-01	6.1790
2013-01-01	6.4813
2014-01-01	7.4672
2015-01-01	8.2363
2016-01-01	8.6686