It is in the thread, but as a percentage it is impossible to say with precision. One can only make a guess based on possibility, tempered with probability.

If Kennedy runs for 20 years, the premine as a percentage of coins at 20 years would be about 3%.

If Kennedy dies at block 300,100,  the premine as a percentage would be 8  - 10%

If Kennedy lives on for 10 years,  the premine would be about 4 - 5%

If Kennedy lives on for 50 years,  the premine would be about 0.5 - 0.8%