Tho^'ng ke^ da^n so^' :

• na(m 1875 : Nam ky` = 2 trie^.u ngu+o+`i va` 60000 km<sup>2</sup> theo Petit cours de Géographie de la Basse-Cochinchine
• na(m 1901 : Ba('c ky` = 6500000 ngu+o+`i va` 116000 ca^y so^' vuo^ng, Trung ky` = 6124240 ng. & 140000 km<sup>2</sup> va` Nam ky` = 2968500 ng. & 59500 km<sup>2</sup> ... Ha` No^.i = 127000 ng., Sa`i Go`n = 47578 va` Cho+. Lo+'n = 163000 ng. )
• na(m 1926 : Ba('c ky` = 7374897 ngu+o+`i, Trung ky` = 5194792 va` Nam ky` = 4059699