CREATE TABLE table_60728 ("County" TEXT, "Per capita income" TEXT, "Median household income" TEXT, "Median family income" TEXT, "Population" FLOAT, "Number of households" FLOAT)

What is the lowest Population, when Per Capita Income is '$16,330'?
SELECT MIN("Population") FROM table_60728 WHERE "Per capita income" = '$16,330'
SELECT MIN("Population") FROM "table_60728" WHERE "Per capita income" = '$16,330'