How much faster do Humans learn skills?

Doh! Seconds after I asked this question, I discovered the answer. I'll post it here to save people the trouble:

From the wiki at: http://ftl.wikia.com/wiki/Races

Humans: -10% experience requirements

However, this still leaves some wondering for me. Because skills do not all have requirements divisible by 10, I wonder how much it truly takes for a human to master each skill. I will update this answer if/when I discover such. (Or I will delete it if someone else's answer completely outclasses this.)

Edit (2):

For shields, Humans require 50 non-ion impacts, down from 55. So this is slightly less than a 10% reduction due to rounding. I still wonder if the remaining skills also round the reduction downward (or, equivalently the requirements upward.)

Bizarrely, Humans only require 14 repairs per level, down from 18. This represents about a 22% reduction! Unless the required repairs per level for everyone was lowered to 16, this means the decreased experience requirement is not the same across skills. If it was lowered to 16 and I didn't notice, this means a 12.5% decrease which only indicates the rounding isn't consistent across skills.

Edit (3):

This wiki states the human reduction in exp requirements. However, the repair required seems inaccurate. That said, I'll double check my work it is (slightly) possible that I miscounted somehow.

For the remaining skills:

Piloting: 15 --> 13
Engines : 15 --> 13
Shields : 55 --> 50 (Verified)
Weapons : 65 --> 58
Repair  : 18 --> 16 (Contested)
Combat  : 8  --> 7 (Verified)