Year	Number
2004-01-01	20.2268
2005-01-01	27.2371
2006-01-01	40.6299
2007-01-01	56.3233
2008-01-01	62.3172
2009-01-01	73.1543
2010-01-01	76.4235
2011-01-01	82.1803
2012-01-01	81.9480
2013-01-01	118.1689
2014-01-01	162.2890
2015-01-01	223.1042
2016-01-01	272.7328