FROM VIKING DRINKING TO STONE AGE FOOD, article.
Denmark’s agricultural roots are still visible in the food that the population eats. More pork and milk products are consumed than in most countries, but even so, the nation’s diet has changed in the last ten years and has become significantly healthier. The consumption of cakes and sweets in Denmark has dropped, and more fruit and vegetables are eaten. The consumption of sweets has decreased so much that the average citizen in neighbouring Sweden consumes almost twice as many sweets (8.2 kilos per year) as the average Dane (4.8 kilos).
Danes still have lots to learn about moderating their alcohol intake, but I think these data are nicely supporting that habits can be changed, even in very large groups and in a rather short time. That's great.