CREATE TABLE table_66328 ("Date" TEXT, "Internet Explorer" TEXT, "Firefox" TEXT, "Opera" TEXT, "Safari" TEXT, "Source" TEXT)

Which source date has an Internet Explorer usage of 60.2%?
SELECT "Source" FROM table_66328 WHERE "Internet Explorer" = '60.2%'
SELECT "Source" FROM "table_66328" WHERE "Internet Explorer" = '60.2%'