Dr. Michael Byrne:

I probably should have clarified this. This was something I did with Threshold because the issue of non-registration had not previously been part of the discussion around this discrepancy. There is no available data on it. The idea was to simply do something that would be very quick and straightforward and could just flag the issue rather than attempt to document or measure the extent of the issue. The Senator is absolutely right and I do not disagree with anything he said. It really was a question of flagging the issue and ensuring it was on the agenda. That is absolutely the case. Nevertheless, I am sure the Senator will agree it is a concerning figure.