What's the highest population density for a population less than 6000?
CREATE TABLE table_9077 (
    "Country or territory" text,
    "Area (km\u00b2)" real,
    "Population" real,
    "Population density (per km\u00b2)" real,
    "Capital" text
)
SELECT MAX("Population density (per km\u00b2)") FROM table_9077 WHERE "Population" < '6000'
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's the highest population density for a population less than 6000? ### Input: CREATE TABLE table_9077 (
    "Country or territory" text,
    "Area (km\u00b2)" real,
    "Population" real,
    "Population density (per km\u00b2)" real,
    "Capital" text
) ### Response: SELECT MAX("Population density (per km\u00b2)") FROM table_9077 WHERE "Population" < '6000'