Terminal growth rate

Hello! I have to value Coca Cola for a university assignment and I am not sure how to estimate the terminal growth rate. I could not find much information on that topic unfortunately. I read that for mature companies it should be somewhere between 2-3%. Based on what data can i come to this growth rate?

Thank you in advance!

GDP growth?

'bout tree fiddy.

3.5%

if you have sources like oxford economics you can check for projected growth of a particular industry/country