CREATE TABLE table_203_370 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

in what year did the runner participate in the most marathons ?
SELECT "year" FROM table_203_370 GROUP BY "year" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "year" FROM "table_203_370" GROUP BY "year" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY