My question is to the Treasurer. I refer the Treasurer to his comment to the National Press Club on the day after the budget: 'We brought a super profits tax in at precisely the time the super profits disappeared.' If so-called 'super profits' have disappeared, on what basis has the Treasurer decided to forecast that the mining tax revenue will increase over 1,000 per cent from $200 million this year to $2.2 billion in 2016-17?