I don't know but it's crazy high - I heard a report on NPR and they used Florida as an example to put things in perspective - the percentage of elderly in Japan is double that of Florida.
That's a good example for games, since it easily allows you to animate the tracks through scrolling UVs, rather than a complex rig. Just something to bear in mind.
I actually would really like to hear anybody's advice on this as well! For example residing in the US but taking currency from the UK or China. Tips much appreciated :)
Keep in mind that Epic likes to make their characters all slightly larger than the average person, so you might not want to use IronGuard as a realistic example.
little off topic but maybe somebody know did bioware facial textures for Mass effect by hand painting or they use photo ? (as example Shepard Miranda Jacob )