CREATE TABLE table_54641 ("Year" FLOAT, "Competition" CLOB, "Venue" CLOB, "Position" CLOB, "Event" CLOB, "Notes" CLOB)

What is the total year with a Position of 12th?
SELECT SUM("Year") FROM table_54641 WHERE "Position" = '12th'
SELECT SUM("Year") FROM "table_54641" WHERE "Position" = '12th'