In the 1980s, during a period of austerity we relaxed control, and we were proud at that point that we had held the population to about 90%, generally speaking, across the basin to what it was pre-control. We started to fall back really quickly well below the 70% range in just a couple of years. They're incredibly prolific in their repopulation.
On February 10th, 2022. See this statement in context.