I'm wondering if the article in Wikipedia is really based on "alcohol consumption" and not Alcohol reported to be sold in the country? There is a clear reason

I'm wondering if the article in Wikipedia is really based on "alcohol consumption" and not Alcohol reported to be sold in the country? There is a clear reason why Luxembourg is on top. The taxes on alcohol is (very) low in Luxembourg and a lot of people from the countries closed to Luxembourg (Belgium, France and Germany) are buying their alcohol there. We don't forget the travellers (Luxembourg is a crossroad in EU) making a stop in Luxembourg...