Year	Number
2009-01-01	74.2934
2010-01-01	100.6933
2011-01-01	153.1489
2012-01-01	201.5398
2013-01-01	251.4709
2014-01-01	326.0990
2015-01-01	472.2077
2016-01-01	510.5412
2017-01-01	531.7512