When was John McEnroe's minimum year?
CREATE TABLE table_2646 (
    "Outcome" text,
    "Year" real,
    "Championship" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score in the final" text
)
SELECT MIN("Year") FROM table_2646
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: When was John McEnroe's minimum year? ### Input: CREATE TABLE table_2646 (
    "Outcome" text,
    "Year" real,
    "Championship" text,
    "Surface" text,
    "Opponent in the final" text,
    "Score in the final" text
) ### Response: SELECT MIN("Year") FROM table_2646