What industry has the highest revenue per employee?
One item that I find potentially misleading is that, to my understanding, oil and gas companies outsource/subcontract a <i>lot</i> of the seasonal/irregular/less predictable work to third-parties.  This means that these people aren't calculated in these numbers, but they generate a good chunk of the revenue.<p>I could be wrong about that, but I used to work with Exxon and they talked about this - that the total employee base would be much larger if you included all of the subcontractors.