% chance of getting a candy for feeding berries

I started a small survey to figure out the % chance of getting a candy when feeding berries to pokémon at a gym. You can contribute (click) here if you kept track of your candies.

It seems to be 0.5-1%, so 1 candy for every 100-200 berries. Assuming each pokémon has the same candy drop-rate.

Edit: Thanks everyone for filling out the form. The current results are 0.65% chance, trainers received 66 candies while feeding 10151 times. The form is still open, so please feel free to add more.