CREATE TABLE table_36823 ("Year" FLOAT, "Competition" CLOB, "Venue" CLOB, "Position" CLOB, "Notes" CLOB)

Which year did the World indoor championships gave a position of 3rd?
SELECT SUM("Year") FROM table_36823 WHERE "Competition" = 'world indoor championships' AND "Position" = '3rd'
SELECT SUM("Year") FROM "table_36823" WHERE "Competition" = 'world indoor championships' AND "Position" = '3rd'