CREATE TABLE table_204_638 (id NUMBER, "year" NUMBER, "tournament" CLOB, "surface" CLOB, "round" CLOB, "winner" CLOB, "score" CLOB)

what was the last year where connors won ?
SELECT MAX("year") FROM table_204_638 WHERE "winner" = 'jimmy connors'
SELECT MAX("year") FROM "table_204_638" WHERE "winner" = 'jimmy connors'