Year	Number
2004-01-01	1077.5528
2005-01-01	1168.3403
2006-01-01	1261.1141
2007-01-01	1341.3376
2008-01-01	1362.4222
2009-01-01	1361.2775
2010-01-01	1399.7061
2011-01-01	1358.7680
2012-01-01	1421.6493
2013-01-01	1449.8987
2014-01-01	1472.6687
2015-01-01	1492.1986
2016-01-01	1513.8918