What year was the rank final of 6?
CREATE TABLE table_name_90 (
    year VARCHAR,
    rank_final VARCHAR
)
SELECT year FROM table_name_90 WHERE rank_final = "6"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What year was the rank final of 6? ### Input: CREATE TABLE table_name_90 (
    year VARCHAR,
    rank_final VARCHAR
) ### Response: SELECT year FROM table_name_90 WHERE rank_final = "6"