The main reason those impacts are so much lower than initially presented in budget 2016 is simply that less than half of that money—it looks like—actually appeared in the time frame that it was planned for, so in 2016–17 and in 2017–18.
Another reason is that, at the time of budget 2016, the economy was operating well below its capacity, and at the time interest rates were lower and, therefore, if the planned amount of money had been spent, those impacts would have been larger and would have been in line both with estimates that Finance Canada presented in budget 2016 and with our estimates that we had at that time too.
So the situation changed economically, and also the funds that were spent were less than expected.