SELECT MIN("Population") FROM table_2928 WHERE "Serbs" = '73.53%'
What is the smallest value of population if the value for Serbs is 73.53%?
CREATE TABLE table_2928 (
    "Year" real,
    "Population" real,
    "Serbs" text,
    "Germans" text,
    "Romanians" text,
    "Hungarians" text,
    "Croats" text,
    "Roma" text,
    "Slovaks" text,
    "Rest" text
)