We don't have that number. The way the carbon tax works, along with the GST, is there's no separate tracking of the amount. Often it's buried in the final price, and GST will be charged on the final price of the product, so there's no accounting that allows us to even calculate that amount.
The other thing is that it's not clear what that amount would represent, because people would have spent that money elsewhere on goods and services on which GST would very likely have been charged anyway, so the differential is not clear either. That's why we don't have that number.