CREATE TABLE table_28524 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Joined" TEXT, "Left" TEXT, "Nickname" TEXT, "Primary Conference when joining the MSFA" TEXT, "Current Primary Conference" TEXT)

How many schools left in 2002-03?
SELECT COUNT("Location") FROM table_28524 WHERE "Left" = '2002-03'
SELECT COUNT("Location") FROM "table_28524" WHERE "Left" = '2002-03'