10 million people live in Sweden. It's also a country with a probably pretty good medical standard and it's not as densely populated as most other European countries. The percentage of old people is also lower as in countries like Italy.
Not to forget that you don't have three or at least two generation living together in one house as often as you have in Southern Europe. How many younger Swedes do live in an university campus or something like that?
Not sure what "Sweden is doing unbelievable good" is supposed to mean with that death rate already and considering all these points