CREATE TABLE table_8213 ("Date" TEXT, "Ship" TEXT, "Nationality" TEXT, "Tonnage" FLOAT, "Fate" TEXT)

What is the total number of Tonnage, when Date is '25 June 1943'?
SELECT COUNT("Tonnage") FROM table_8213 WHERE "Date" = '25 june 1943'
SELECT COUNT("Tonnage") FROM "table_8213" WHERE "Date" = '25 june 1943'