Year	Number
2005-01-01	2.2941
2006-01-01	2.7412
2007-01-01	3.3801
2008-01-01	4.2896
2009-01-01	5.3123
2010-01-01	7.2684
2011-01-01	8.8518
2012-01-01	10.9921
2013-01-01	12.8665
2014-01-01	17.7960
2015-01-01	19.7014
2016-01-01	21.2358