CREATE TABLE table_43388 ("Rank" FLOAT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

How many Silver medals did the Nation with a Rank of less than 1 receive?
SELECT AVG("Silver") FROM table_43388 WHERE "Rank" < '1'
SELECT AVG("Silver") FROM "table_43388" WHERE "Rank" < '1'