Year	Number
2004-01-01	52.3632
2005-01-01	49.7755
2006-01-01	57.7022
2007-01-01	61.7125
2008-01-01	204.0256
2009-01-01	183.6336
2010-01-01	145.5305
2011-01-01	146.5490
2012-01-01	143.8154
2013-01-01	150.7945
2014-01-01	228.9593
2015-01-01	181.9195