This older graph of data does show a small uptick in consumption. However, I can't track where the meat eventually ends up. Cold storage is expensive and other consumer niches like pet food and institutional purchases (schools, old age homes) etc. may be part of the mix. Since the government/ ICR/Fisheries are conjoined - the effort to move stockpiled product may be a factor in the small upticks.
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It is possible. However, this is the best (most detailed, and most up to date) data series I have seen. While the raw numbers can hide the true picture, they certainly doesn't support the hypothesis that whale meat is being stockpiled. Until we have some accurate information, that thesis must remain conjecture, rather that fact.
So, we have established that whaling can be profitable, and we have also established there is no evidence of a slackening of demand - indeed what little data we have tends to show a slight trend to the opposite.