Year	Number
2004-01-01	66.2274
2005-01-01	73.4071
2006-01-01	72.3586
2007-01-01	83.6831
2008-01-01	117.5331
2009-01-01	140.8254
2010-01-01	162.1278
2011-01-01	274.4459
2012-01-01	393.1772
2013-01-01	394.4891
2014-01-01	469.2635
2015-01-01	565.7999
2016-01-01	517.8872
2017-01-01	584.6999