This isn't true:

>>In the middle of the 14th century, Sweden was struck by the Black Death.[28] The population of Sweden and most of Europe was seriously decimated. And the population (at same territory) as existed by 1348 did not reach the same numbers again until the beginning of the 19th century. One third of the population died during 1349–1351.

[1] https://en.wikipedia.org/wiki/Sweden [2] http://staff.harrisonburg.k12.va.us/~cwalton/walton/SOLPics/...