We estimate it's around 5.8 million, so there's a good buffer there.
Having said that, as it's noted, we are harvesting aggressively. When the markets are there, there's an opportunity for the hunters to take more than what's called the “replacement yield”. The number of new pups that are produced minus the natural mortality will give you a replacement yield that you can take in a hunt and have no impact on the population.
Well, we're above that. If we were to keep the level of hunt going, we might within a few years come down to that 4 million. Then we'd have to switch our strategies. But we are taking now at a level that should prevent further growth in the population and could have some modest impact on the overall stock over time.