The poll honestly just feel extremely inaccurate, and I’m guessing the biggest cause for the faulty proportions is them included tons of non-Jews as others have pointed out.
Only 10% of Jews live in the midwest? The region which includes Cleveland, Chicago, Milwaukee, Detroit, Columbus, Cincinnati, etc. There’s no way it has less than half of the “west” which is basically just LA and San Francisco, or the “south” which is basically just Florida.
If 75% of non-Orthodox Jews marry goyim, then at least half of those are producing non-Jewish kids. The proportions of non-Orthodox young people are being massively overestimated.