The rest of your question was about what has changed on the other side. We are carrying out larger and larger fracs. It has been a steady progression. Ten or twenty years ago we might have been doing 30-tonne fracs. Now we're doing 100-tonne and 200-tonne fracs. So we've increased the size of individual fracs.
Then we've put more than one frac into one well in these horizontal wells. Those have been the advancements.