CREATE TABLE table_45520 ("Poll Source" TEXT, "Dates administered" TEXT, "Democrat: Tom Harkin" TEXT, "Republican: Christopher Reed" TEXT, "Lead Margin" FLOAT)

What percentage did Republish Christopher Reed receive when the lead margin was smaller than 16?
SELECT "Republican: Christopher Reed" FROM table_45520 WHERE "Lead Margin" < '16'
SELECT "Republican: Christopher Reed" FROM "table_45520" WHERE "Lead Margin" < '16'