What is the total number in 2006, which has an official foundation of municipality of 1918?
CREATE TABLE table_45531 (
    "Rank" real,
    "City" text,
    "Province" text,
    "Date of Official Foundation of Municipality" real,
    "2006" real,
    "1996" real,
    "1986" real,
    "1976" real,
    "1966" real,
    "1956" real
)
SELECT COUNT("2006") FROM table_45531 WHERE "Date of Official Foundation of Municipality" = '1918'
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 is the total number in 2006, which has an official foundation of municipality of 1918? ### Input: CREATE TABLE table_45531 (
    "Rank" real,
    "City" text,
    "Province" text,
    "Date of Official Foundation of Municipality" real,
    "2006" real,
    "1996" real,
    "1986" real,
    "1976" real,
    "1966" real,
    "1956" real
) ### Response: SELECT COUNT("2006") FROM table_45531 WHERE "Date of Official Foundation of Municipality" = '1918'