CREATE TABLE table_7521 ("Heat" FLOAT, "Lane" FLOAT, "Name" TEXT, "Country" TEXT, "Mark" TEXT)

What is the total lane number for the United States when the mark is 6.62 and the heat is greater than 8?
SELECT COUNT("Lane") FROM table_7521 WHERE "Country" = 'united states' AND "Mark" = '6.62' AND "Heat" > '8'
SELECT COUNT("Lane") FROM "table_7521" WHERE "Country" = 'united states' AND "Heat" > '8' AND "Mark" = '6.62'