"That doesn't sound like countries with a drinking problem to me."
In the UK, ~5% of the population drink 30% of the alcohol. I believe the figure comes from the NHS and is summarised in the following graph showing drinkers cunsuming more than 35 units of alcohol per week:
https://www.drinkaware.co.uk/media/293220/figure-1-summary-of-weekly-alcohol-consumption-2017-1.png
https://digital.nhs.uk/binaries/content/documents/corporate-website/publication-system/statistical/statistics-on-alcohol/2019/part-4/part-4/publicationsystem%3AbodySections%5B9%5D/publicationsystem%3Aimage
~5% of all UK adults is around 2 million people.