"According to a 2008 article in the professional journal Pediatrics, children under age two are 75% less likely to be killed or suffer severe injuries in a crash if they are riding rear facing rather than forward facing. In fact, for children 1–2 years of age, facing the rear is five times safer."
Rear-facing is the safest position the child can ride in.
It is strongly recommended that all children stay rear-facing beyond the minimum requirements of 1 year and 20 lbs. Children should not be turned forward-facing until they reach the maximum rear-facing limits of a convertible seat.