It seems Yields are often off by 0.1 in comparison to the value that TopPanel gives. It can easily be reproduced by starting a game and comparing the values (no other mods used); Culture and GPT seem to always be off, Science is always spot on:

https://imgur.com/a/mSp8j5e

From looking at a code, I cannot find anything specific to Culture and Gold. Also, the error is not always occuring as the game progresses.

Is this a rounding error incurred from using a different equation from the method TopPanel uses?