Can you show me a source for your claim that it has increased? Here's another graph for the energy mix over time, with coal not changing at all. This time from the government energy agency. See page 5.

http://energimyndigheten.a-w2m.se/FolderContents.mvc/Downloa...

Unfortunately the Swedish authority wants to look good so their promotional materials show domestic and only pay lip service to imports.

If you follow the flow from: https://www.svk.se/en/national-grid/the-control-room/ you see that most of those countries primarily generate electricity using Oil, Gas and especially coal. (Latvia, Lithuania and to a lesser extent: Estonia)

Page 12, same document. Import, export and net for the year 2019 to all those countries. This isn't some kind of conspiracy.

Some import from Denmark and Norway. Negligible from Poland, Germany, Lithuania. Net is export to all, which means Swedish clean power is actually displacing dirtier sources, except in Norway which is full on hydro.