Toyota typically runs a body design for 5 years, with minor trim and non-sheet metal changes in years inbetween distinct changes. Their cost structure must be highly controlled to keep their model change to that precicse a schedule.

It has been said:
Hybrid drivers come in 3 flavors, greenie, techie and cheapie. Pick any 2.
2005 Prius, Melinium Silver over gray, package 5 (AI)