It is considered personal data by the likes of the EU, the issue however a pesky little thing called the Swedish Constitution, specifically chapter 2 of the "Freedom of the Press Act" which basically states, in very simple terms:

1. Everyone(1) shall be entitled to have free access to official documents.

2. Official documents are all(2) documents held and produced by the authorities.

(1)=Everyone includes everyone in the world, you do not have to live in Sweden or be a citizen and you do not have to identify yourself.

(2)=Some restrictions apply (natsec, medical, etc).

In short, most government databases are databases of "official documents", including the citizenship registry maintained by the tax authorities.

Downside: All the mundane information about you is public property; address, birthdate, tax records, school grades, drivers license, passport photograph, martial status, court cases and pretty much everything else you can't think of.

Upside: Applies to all politicians as well.

I didn’t know that is enshrined in the Swedish constitution. I’m staring to like Sweden even more

Disturbing. Serious lack of respect for the rights of the citizenry of the country to privacy.