Formula for hireling skill "lvlperlvl"

[ciM2pHat4U]

Does anybody know how the "lvlperlvl" number in hireling.txt works? The default numbers are either 0, 5, or 10. Is this number then divided by a constant (like dex/lvl is divided by 8) or put through some other formula?

Thanks in advance. I know diablo isn't super popular anymore, but all is appreciated.

-ciM2pHat4U