You can derive this from the orders. They are always 1000 or multiple of 1000 and sometime the transactions fee of .1 NLG added. Second thing is the pools together did not have 350 Mhs the last days.
But the solominers are included in the total hashrate, isn't it? If so, the solominer can't get that much a day or he must have 100 Mh/s+ of the network or so.