you would be incorrect, there seems to be a somewhat positive trend.
look for yourself.
GP Strasbourg (13/04/2013) - Number of Players : 1365
GP Washington D.C. (16/11/2013) - Number of Players : 1698
GP Paris (15/02/2014) - Number of Players : 1587
GP New Jersey (15/11/2014) - Number of Players : 4003
Why was GP NJ attended 2-3 times more than others?