What was the last year that they had less than 16 points in class 500cc?
CREATE TABLE table_5115 (
    "Year" real,
    "Class" text,
    "Team" text,
    "Points" real,
    "Rank" text,
    "Wins" real
)
SELECT MAX("Year") FROM table_5115 WHERE "Points" < '16' AND "Class" = '500cc'
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 was the last year that they had less than 16 points in class 500cc? ### Input: CREATE TABLE table_5115 (
    "Year" real,
    "Class" text,
    "Team" text,
    "Points" real,
    "Rank" text,
    "Wins" real
) ### Response: SELECT MAX("Year") FROM table_5115 WHERE "Points" < '16' AND "Class" = '500cc'