That should largely reflect just the different nominal GDP bases and, within nominal GDP, the different shares accruing to households versus firms. The difference between us, the delta between us and Finance, would probably be attributable to its risk adjustment, which is spread proportionally over tax revenues.
Across those tax categories, you have to lose $6 billion from somewhere. We're not sure exactly where, but they have mentioned in the past that it's proportionally across, so about a $1-billion difference over the five years is what you'd expect from the forecast adjustment that Finance does.
Ours is an unadjusted economic forecast underlying the fiscal.