How many deciles have Years of 1 8, and a Roll of 49?
CREATE TABLE table_14986 (
    "Name" text,
    "Years" text,
    "Gender" text,
    "Area" text,
    "Authority" text,
    "Decile" real,
    "Roll" real
)
SELECT COUNT("Decile") FROM table_14986 WHERE "Years" = '1–8' AND "Roll" = '49'
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 deciles have Years of 1 8, and a Roll of 49? ### Input: CREATE TABLE table_14986 (
    "Name" text,
    "Years" text,
    "Gender" text,
    "Area" text,
    "Authority" text,
    "Decile" real,
    "Roll" real
) ### Response: SELECT COUNT("Decile") FROM table_14986 WHERE "Years" = '1–8' AND "Roll" = '49'