Year	Number
2004-01-01	0.9786
2005-01-01	2.6623
2006-01-01	6.2887
2007-01-01	12.0449
2008-01-01	19.1826
2009-01-01	19.6431
2010-01-01	21.5858
2011-01-01	22.5644
2012-01-01	27.8170
2013-01-01	29.7165
2014-01-01	30.9109
2015-01-01	30.4648
2016-01-01	32.2349