Call or visit the Swedish Tax Agency if you want further info, such as personal identity number ("personnummer" - think Social Security Number but used for absolutely everything), taxed income, identity and full info of parents (including mother's maiden name - so much for that), etc. You don't have to tell them who you are or why you want this information.
Enter a street address on a site like ratsit.se and you'll find all the people registered on that particular address. I could go on. When I talk about this with friends in countries like Germany and France they're often flabbergasted; in Sweden we're so used to it that we think it's natural. We're basically doxxed by our own government by default. A stalker or identity thief's paradise. It's messed up.