CREATE TABLE table_11751 ("Town/City" TEXT, "Population" FLOAT, "Operator" TEXT, "First year" FLOAT, "Duration" TEXT)

Which is the smallest First year when the population is 32,645?
SELECT MIN("First year") FROM table_11751 WHERE "Population" = '32,645'
SELECT MIN("First year") FROM "table_11751" WHERE "Population" = '32,645'