how many are enrolled in private/catholic ?
CREATE TABLE table_203_518 (
    id number,
    "institution" text,
    "location" text,
    "nickname" text,
    "founded" number,
    "type" text,
    "enrollment" number,
    "joined\nmac" number
)
SELECT SUM("enrollment") FROM table_203_518 WHERE "type" = 'private/catholic'
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: how many are enrolled in private/catholic ? ### Input: CREATE TABLE table_203_518 (
    id number,
    "institution" text,
    "location" text,
    "nickname" text,
    "founded" number,
    "type" text,
    "enrollment" number,
    "joined\nmac" number
) ### Response: SELECT SUM("enrollment") FROM table_203_518 WHERE "type" = 'private/catholic'