Hah, that one is funny. The numbers for Stockholm look really weird. Groceries is at index 110, but rent at 27. This is true and a result of decades of political rent control, but what the numbers don't tell you is that it's impossible to actually get a decent apartment for rent. It's a completely dysfunctional market.

If they would have factored in the costs for buying an apartment or a house, it would look a lot more sane, and you would get numbers that are closer to what you would expect.