Only source is that I’ve been a sometimes-mariner and cruising family captain since the 80s, hearing about the reports on the cruiser HF nets, and gradually wit

Only source is that I’ve been a sometimes-mariner and cruising family captain since the 80s, hearing about the reports on the cruiser HF nets, and gradually witnessing a change from often aggressive , sometimes disastrous encounters to mostly peaceful or even sometimes friendly or helpful encounters into the 2010’s. I’m sure there is data somewhere, though. In the 90s, the gradual drop off in attacks was widely attributed to whales that witnessed whaling aging out. I doubt there is any scientific validation for this theory, but it is plausible as there are many accounts of whales with old whaling wounds being exceptionally aggressive, with some becoming legendary in their own right.