Year	Number
2004-01-01	1148.4679
2005-01-01	1442.5080
2006-01-01	1673.1769
2007-01-01	2365.9750
2008-01-01	2518.5394
2009-01-01	2476.7062
2010-01-01	2527.1028
2011-01-01	2657.7023
2012-01-01	2616.9165
2013-01-01	2652.0003
2014-01-01	2180.9471
2015-01-01	2050.7437
2016-01-01	1967.3981