1 point
Split in a way I guess. It jumped to over 50% soon after Russian invasion of Ukraine and seems to have (so far) stayed there. And those opposing it were only at 19% when the decision to apply for membership was made. Most recent poll I found was 62% for, 22% against.
https://www.statista.com/statistics/660842/survey-on-perception-of-nato-membership-in-sweden/