A (11 countries)

B (17 countries)

C (18 countries)

D (4 countries)

E (8 countries)

F (3 countries)

G (11 countries)

H (3 countries)

I (8 countries)

J (3 countries)

K (6 countries)

L (9 countries)

M (18 countries)

N (11 countries)

O (1 country)

P (10 countries)

Q (1 country)

R (3 countries)

S (26 countries)

T (11 countries)

U (7 countries)

V (4 countries)

Y (total: 1 country)

Z  (2 countries)