CREATE TABLE table_204_737 (id DECIMAL, "year" DECIMAL, "order" TEXT, "quantity" DECIMAL, "ger nos." TEXT)

what is the number of years with a quantity of 10 ?
SELECT COUNT(DISTINCT "year") FROM table_204_737 WHERE "quantity" = 10
SELECT COUNT(DISTINCT "year") FROM "table_204_737" WHERE "quantity" = 10