Swedes and Norwegians not only have ancient farmer ancestry that arrived from the Near East, they also have Caucasus ancestry that was part of the steppe migration.
So, on the following graphic, EN is almost identical to Anatolia Neolithic, and steppe can be somewhere around 40% "CHG", also from the Near East.
So, I'd say maybe at least 40% "southern"ancestry?
You know, I think someone from northern Sweden posted his results from geneplaza. Ah, here they are:
"Results north swedish
STEPPE CULTURES 45.1
KARASUK-E SCYTHIAN 21.2
ANDRONOVO-SRUBNAYA 16.4
YAMNAYA-AFANASIEVO-POLTAVKA 7.5
ANCIENT FARMERS 38.4
WEST EUROPEAN FARMERS 13.5
LEVANT 2.8
NEOLITHIC-CHALCOLITHIC IRAN-CHG 0.0
EAST EUROPEAN FARMERS 22.1
WESTERN EUROPEAN & SCANDINAVIAN HUNTER GATHERERS 16.4"
So, if you consider that Andronovo was about 15-20% farmer, plus some in Yamnaya, you're over 40%, maybe 45% or more.
Goodness, should we put the Haak, Lazaridis, Matthiesen, etc. etc. papers as stickies?