Table schema:
CREATE TABLE table_name_38 (total_foreign_born__millions_ INTEGER, born_in_a_non_eu_state__millions_ VARCHAR)

Question: What was the lowest number of Total Foreign-born (millions) people, when the number of people Born in a non EU state (millions) was 6.415?
SQL: SELECT MIN(total_foreign_born__millions_) FROM table_name_38 WHERE born_in_a_non_eu_state__millions_ = 6.415