CREATE TABLE table_58739 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Pts." CLOB)

What is the year of the Lotus 18 chassis?
SELECT COUNT("Year") FROM table_58739 WHERE "Chassis" = 'lotus 18'
SELECT COUNT("Year") FROM "table_58739" WHERE "Chassis" = 'lotus 18'