Year	Number
2004-01-01	1293061.5
2005-01-01	1294524.0
2006-01-01	1423688.0
2007-01-01	1516769.0
2008-01-01	1591280.0
2009-01-01	1657617.0
2010-01-01	1734508.0
2011-01-01	1750159.0
2012-01-01	1770499.0
2013-01-01	1787921.0
2014-01-01	1769302.0
2015-01-01	1757480.0
2016-01-01	1656226.0
2017-01-01	1599563.0