CREATE TABLE table_204_298 (id DECIMAL, "year" DECIMAL, "competition" TEXT, "venue" TEXT, "position" TEXT, "event" TEXT, "notes" DECIMAL)

how long did this runner compete in years ?
SELECT MAX("year") - MIN("year") + 1 FROM table_204_298
SELECT MAX("year") - MIN("year") + 1 FROM "table_204_298"