Year	Number
2007-01-01	531.3663
2008-01-01	540.6025
2009-01-01	546.2931
2010-01-01	548.0988
2011-01-01	673.4434
2012-01-01	674.6074
2013-01-01	673.0110
2014-01-01	668.9431
2015-01-01	665.9174
2016-01-01	664.4833
2017-01-01	665.1915