Year	Number
2007-01-01	474.0042
2008-01-01	492.9766
2009-01-01	483.6212
2010-01-01	485.0326
2011-01-01	504.9538
2012-01-01	533.3203
2013-01-01	574.6674
2014-01-01	564.7417
2015-01-01	577.5904
2016-01-01	600.4058
2017-01-01	612.4484