I wanted to counter this with the fact that you and me are both still alive, so the rate is only approaching 100%, but probably never quite there.
Then I did a safety google, and got to learn that fatality rate apparently doesn't care about the time until death. So as long as I don't assume I'm immortal, your fact still holds true.
But then I remembered that some jellyfish and sponges are considered to be be more or less immortal.
Which raises the question: do we count beings which will most probably die out due to the expansion of our own sun as part of that 100% rate?
That's what always made me amused about people talking about crocodiles and alligators being apex predators because their stomach acid was strong enough to break down bone. People did not seem to be aware that their own stomach acid was of a similar pH and could also break down bone.
Because acids dislodge rust, and Coca-Cola contains citric acid, which is a very weak acid. If you're looking for a comestible to remove rust, vinegar would work better.
citric acid can also chelate iron to some degree so on acid basis citric acid should dissolve rust a bit better than most. but coke is made with phosphoric acid which doesn't do that