Sweden very probably has a census … most every modern nation has one … and a lot of their info gets posted on the Internet, but is it in English? You’d need to find the word in Swedish that means Census & they might use a similar word.

The Washington Post in USA, Economist in Britain, other media in other nations, they provide background information on different nations, but if I want demographic information on some nation in a hurry, I like to check the CIA fact book of stuff they let just anyone know. Here’s the CIA fact book on Sweden:

https://www.cia.gov/library/publications/the-world-factbook/geos/sw.html

To make progress with questions like this so as to do your homework studies effectively, you need to learn how to use Internet Search Engines, and you need to know how to use research places for free, and know why some are a little unreliable.

http://www.google.com/search?hl=en&q=Sweden+demographics