That's interesting, I didn't know there were official statistics. It's a lot more than I would have guessed, given the official recommended maximum consumption of pilot whale [1] is 300g per month per adult. 50,000 people [2] gives 180,000 kg per year.
An average mass for a pilot whale might be 1300 kg, of which perhaps half is edible [4].
That means 275 whales is more than enough, yet over double that is caught in the average year.
Presumably, many people aren't bothered by the toxins.
[1] http://www.whaling.fo/media/1043/hfs-uk_0.pdf
[2] I'm ignoring children, pregnant women etc, who have a lower/nil recommendation, so this estimate is an overestimate
[3] https://en.wikipedia.org/wiki/Pilot_whale#Description
[4] http://www.omafra.gov.on.ca/english/livestock/beef/facts/05-... or http://www.icrwhale.org/pdf/SC004184-209.pdf since I can't see how much meat + blubber there is on a pilot whale
Here is a table from 2000 to 2017
http://www.whaling.fo/en/regulated/450-years-of-statistics/c...
As you can see, it varies wildly, going from zero some years to around 1,500 some years.