The line graph compares the production of four types of fish (salmon, cod, tuna, mackerel), measured in tonnes, over the three decades from 1990 to 2020.
Overall, the production of salmon increased significantly, establishing it as the most commonly produced fish by the end of the period, while Cod production followed the opposite trend and declined considerably. Initially, tuna production remained relatively stable, but then dropped substantially, whereas mackerel figures fluctuated from beginning to end.
In 1990, salmon was the least produced fish, at 20.000 tonnes, compared with 180.000 tonnes of cod. Over the following years, cod production fell sharply by 140.000 tonnes in 2020, while salmon followed the opposite trend, rising significantly to 220.000 by the end of the period.
Meanwhile, tuna production remained consistent at around 140.000 tonnes until 2005, after which it decreased considerably to approximately 80.000 tonnes in 2010 and then declined slightly. Mackerel, by contrast, fluctuated noticeably from 60.000 tonnes to around 100.000 tonnes, before declining in 2020 and recovering to a similar figure as in 1990 at 60.000 tonnes.
