We based our calculations on the gap between the 4.4% target and the objective of 200,000 francophone immigrants.
Also factored in was Canada's intention to raise its overall immigration target, which would increase from 350,000 to 410,000 and then to 450,000. That would make it even more difficult to achieve our francophone immigration target. I believe that an 8% target is a minimum.
Other witnesses will probably have much more statistically detailed analyses to answer the question. However, we will be facing a challenge when the number of immigrants increases substantially, because we would then have to figure out how to reach the target.