Which out of these surprised you?
I searched for countries which doesn't produce as much pornstar as USA,
Japan, UK or germany...
as a big boobs addict, I restricted my search to boobpedia results (>= C-cup)
Thai return only 35 results (mixing model / actress / singer and pornstars)
Vietnamese return 37 results
South Korean : 26
Taiwanese : 8
and then,
China : 76 (to be put in relation with the 1,3 billion's population ...)
Indian : 60 (1,2 billion)
Japan : 648 (0,13 billion)
German : 440
British : 2773
USA : 6140
real surprising nationalities are North Korean, Iranian, Afghan, ... where humans rights are pretty limited.
freeones only return 1 result from North Korea :
Abbie Ratay
(only a model but her courage deserves recognition)