SELECT COUNT("Population") FROM table_23092 WHERE "Capital" = 'Hong Kong'
How many populations have a capital of Hong Kong?
CREATE TABLE table_23092 (
    "Country" text,
    "Area km\u00b2" real,
    "Population" real,
    "Population density per km\u00b2" real,
    "HDI (2011)" text,
    "Capital" text
)