% of fast food soda sales which are diet

Was trying to find this, but my Google-fu was weak today…. What percentage of pop sales are lower calorie? In restaurants? Fast food places? Other areas? What percentage of regular pop drinkers would refuse to drink diet or low calorie for any reason (taste, philosophy, health concerns about sweeteners…)?

You think this would be easy to Google. But while it’s easy to find which diet drinks are popular, numbers are harder to find.

StG

Thanks. Perhaps that breaks it into different areas, etc. for subscribers. Still, I guess there is no reason to think the percentage varies that much between retail and fast food.

Moved to cafe society.