Year	Number
2004-01-01	68.5617
2005-01-01	89.9346
2006-01-01	110.5550
2007-01-01	135.9271
2008-01-01	144.1670
2009-01-01	138.4911
2010-01-01	137.1317
2011-01-01	143.3402
2012-01-01	150.9462
2013-01-01	153.1286
2014-01-01	150.6534
2015-01-01	142.2759