I am curious to know what the "other" comprises, since I have never heard anything else here.
Oddballs who call it "soda pop" or "soft drink", and (especially in less populated areas) annoying trolls.
I have a friend who uses "fizzy drink." I think someone else floated the possibility it might include non-English responses.
You can see for yourself
here.
For WA:
101 soda pop
26 soft drink
8 Pepsi
7 Cola
5 drink
3 Dew
3 beverage
3 Brand name
3
(long winded troll reply)for OH:
93 soft drink
87 soda pop
12 pepsi
12 cola
9 [real name] is awesome drink
8 drink
7 carbonated drink
7 IT IS SODA. It has always been soda and only and idiot would call it POP. Go to LaRosa's, Penn Station Subs, Skyline Chili and see it called SODA on the menu board. SODA PEOPLE!