Hehe, there are so many questions that I would like to answer right away, but I should speak with Knudsen about those aswell before answering.
Though as I am taking several classes about media around the world, I may answer this.
"The Simpsons" just as other shows like "Lost", "OZ", "Everyone Loves Raymond", "Family Guy" and so on are broadcasted in Sweden aswell as in many other countries.
Unless France and Germany though (For example), Sweden does not dub American, nor Brittish TV series nor movies.
And the reason to why most of the shows on TV are American is simply that it is less expensive to broadcast shows that have already been made, than making new ones; Especially as the Swedish people are really good at English and there is a thing called subtitles. ;-)