Year	Number
2004-01-01	116.4638
2005-01-01	134.6922
2006-01-01	138.0696
2007-01-01	146.2711
2008-01-01	171.9608
2009-01-01	189.5825
2010-01-01	196.3770
2011-01-01	213.5858
2012-01-01	218.7376
2013-01-01	212.4523
2014-01-01	217.2482
2015-01-01	218.1480
2016-01-01	219.2064