To add to this, to get a contract via the government run queue for rentals[1]:
Average time in queue in the Stockholm region: 8.5 years.
Average time in queue for central Stockholm: 15 Years.
If you don't want to wait that long, you generally have to a) sub-let, which as the example above shows, is very expensive. b) buy something, which in the central areas of Stockholm cost something like 50-80K SEK per square meter.