Hon DAVID PARKER (Minister of Revenue): On a number of occasions I've already described how the threshold is calculated, so I'm not going to repeat that. But in respect of why the calculation is different this year to last year, it's because last year we changed the amount that someone on a benefit can earn before their benefit abates, and that therefore changed the maximum amount that a person on a benefit after abatement could earn, that had to be then reflected in the change to the minimum family tax credit so that a person who wasn't on a benefit would not be worse off.