Which ethnicity of women do you think ages the best and who ages the worst?

Heres what Ive noticed:

white women
age 20: Looks 25
age 30: looks 50
age 40: looks 60
age 50: looks 70

Asian women
age 20: looks 10
age 30: looks 20
age 40: looks 30
age 50: looks 500

black women:
age 20: looks 20
age 30: looks 25
age 40: looks 35
age 50: looks 45