What we knew from our general statistics was that about two-thirds of members were tabling questions through the MemberHub. The procedure allows members to delegate certain tasks to their staff to do on their behalf, and tabling an oral question is one of them.
What we found once we dug into a bit more detail was that of that two-thirds, it was pretty much fifty-fifty between members who were doing it themselves and members who were letting their staff do it for them. We focused on that group of members who perhaps weren't using it actively themselves a lot of the time, and the one-third who just weren't using it at all, to make sure they were familiar.
The key thing to point out is that front-bench government ministers, and probably front-bench opposition, don't table questions. Ministers certainly can't table oral questions, because they answer them, and the opposition front benches don't tend to table very many questions in that way.
There is quite a good chunk of the House that just doesn't have cause to use it. We had a former prime minister who never used it before.