However , unbalanced fishery led to the drastic decrease of catch in 1955 -- 1963 , sometimes to 1,600 tonnes per year .
After the war , between 2000 -- 2018 , the total annual catch increased and reached a maximum of 4,900 tonnes .
Unbalanced fishery led to the drastic decrease of catch in 1955 -- 1963 , sometimes to 1,600 tonnes per year .
After the war , between 2000 -- 2018 , the total annual catch increased and reached a maximum of 4,900 tonnes .