Table schema:
CREATE TABLE table_11214212_1 (naturalisation_by_marriage VARCHAR, numer_of_jamaicans_granted_british_citizenship VARCHAR)

Question: what's the naturalisation  by marriage with numer of jamaicans granted british citizenship being 3165
SQL: SELECT naturalisation_by_marriage FROM table_11214212_1 WHERE numer_of_jamaicans_granted_british_citizenship = 3165