We did mention that we're starting to do some socio-economic work, in addition to the work on ecological risks and damage, to bring a picture of what the socio-economic risks and damage would be. I'm not aware that we're in a position right now to talk about damage across all aquatic invasive species in Canada.
To bring it back to the Great Lakes, David elaborated earlier on the Asian carp. There is a specific piece of work currently under way that will give us a socio-economic risk evaluation associated with Asian carp, which would be in the general direction of your question. But there would need to be further work done on a much more global basis within Canada to talk about the collective impact of all invasive species.