Year	Number
2004-01-01	191.2846
2005-01-01	188.5318
2006-01-01	185.4940
2007-01-01	181.2764
2008-01-01	179.7082
2009-01-01	177.0260
2010-01-01	171.7676
2011-01-01	171.3626
2012-01-01	170.5136
2013-01-01	174.7564
2014-01-01	188.9672
2015-01-01	195.5039
2016-01-01	202.1514
2017-01-01	208.3475