Year	Number
2007-01-01	490.8010
2008-01-01	516.7238
2009-01-01	505.9601
2010-01-01	507.4033
2011-01-01	527.6327
2012-01-01	559.2678
2013-01-01	601.8743
2014-01-01	589.7489
2015-01-01	602.6149
2016-01-01	625.8090
2017-01-01	638.9302