SELECT MIN("Indians admitted") FROM table_21409 WHERE "Sri Lankans admitted" = '3104'
What is the most number of Indians admitted to Canada when the number of Sri Lankans admitted was 3104?
CREATE TABLE table_21409 (
    "Year" real,
    "Indians admitted" real,
    "Pakistanis admitted" real,
    "Sri Lankans admitted" real,
    "Bangladeshis admitted" real,
    "Nepalis admitted" real
)