How many locations had a density (pop/km ) of 91.8 in the 2011 census?
CREATE TABLE table_19211 (
    "Name" text,
    "2011 Census" real,
    "2006 Census" real,
    "% change" text,
    "Land area (km\u00b2)" text,
    "Density (pop/km\u00b2)" text,
    "Population rank" real
)
SELECT COUNT("2011 Census") FROM table_19211 WHERE "Density (pop/km\u00b2)" = '91.8'
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 locations had a density (pop/km ) of 91.8 in the 2011 census? ### Input: CREATE TABLE table_19211 (
    "Name" text,
    "2011 Census" real,
    "2006 Census" real,
    "% change" text,
    "Land area (km\u00b2)" text,
    "Density (pop/km\u00b2)" text,
    "Population rank" real
) ### Response: SELECT COUNT("2011 Census") FROM table_19211 WHERE "Density (pop/km\u00b2)" = '91.8'