Year	Number
2004-01-01	74.4304
2005-01-01	85.5534
2006-01-01	117.7946
2007-01-01	130.6615
2008-01-01	138.5947
2009-01-01	144.1482
2010-01-01	154.8999
2011-01-01	171.6206
2012-01-01	190.7779
2013-01-01	201.5059
2014-01-01	211.8333
2015-01-01	218.9886
2016-01-01	226.2214