CREATE TABLE table_15341 ("Client" CLOB, "Years of Operation" CLOB, "Area of Operation" CLOB, "Country" CLOB, "Services" CLOB)

What years was El Mabrouk the area of operation?
SELECT "Years of Operation" FROM table_15341 WHERE "Area of Operation" = 'el mabrouk'
SELECT "Years of Operation" FROM "table_15341" WHERE "Area of Operation" = 'el mabrouk'