The SD shouldn't be too hard to come up for a programmer that has access to the database. I could do it myself but that would mean entering hundreds of entries manually. I'll do the ranges:

Insight MT: 103.5 to 53.3
Insight CVT: 53.3 to 41.0
Prius 2: 63.6 to 36.3
Prius 1: 57.3 to 42.1
HCH CVT: 58.2 to 37.0
HCH MT: 54.5 to 44.0

Yep HCH MT has the smallest range!