Approximate Year of Skull Formation (negative = B.C., positive = A.D.)
-4000 = 4000 BC
-3300 = 3300 BC
-1850 = 1850 BC
-200 = 200 BC
150 = 150 AD

1 = Lower 25th percentile
2 = 25th to 75th percentile
3 = Upper 25th percentile

1 = Below mean Nasal Height
2 = Above mean Nasal Height