What’s your blood type? You should know

In an emergency, could you state your blood type?

What’s your blood type? How common is it?

O+     (1 IN 3)
A+     (1 IN 3)
B+     (1 in 12)
Ab+   (1 in 29)
O-      (1 in 15)
A-      (1 in 16)
B-      (1 in 67)
AB-   (1 in 167)