Year	Number
2004-01-01	432.6616
2005-01-01	436.5045
2006-01-01	447.1076
2007-01-01	484.4753
2008-01-01	513.0837
2009-01-01	521.1052
2010-01-01	513.2162
2011-01-01	522.3789
2012-01-01	527.5285
2013-01-01	546.3136
2014-01-01	556.2015
2015-01-01	578.8289
2016-01-01	677.5784
2017-01-01	656.4945