Year	Number
2004-01-01	3605.3276
2005-01-01	3620.3308
2006-01-01	3615.0865
2007-01-01	3740.4791
2008-01-01	3972.6839
2009-01-01	3961.8046
2010-01-01	4045.6653
2011-01-01	4000.2673
2012-01-01	3997.9421
2013-01-01	4022.5264
2014-01-01	3929.3883
2015-01-01	3931.0197
2016-01-01	3910.8159