Year	Number
2004-01-01	113.2598
2005-01-01	161.6549
2006-01-01	270.4995
2007-01-01	183.1356
2008-01-01	172.9757
2009-01-01	250.0193
2010-01-01	271.9798
2011-01-01	323.7319
2012-01-01	485.4521
2013-01-01	632.1519