TOKYO, June 31 (Reuters) - State-run Saudi Aramco has set its August contract price for propane at $775 a tonne, up $200, or nearly 35 percent, from the July level, an industry source said on Tuesday.     The company also raised its August butane price by $155, or 25 percent, from July, to $775 a tonne, the source said.     The prices provide a benchmark against which Middle East  sales of liquefied petroleum gas (LPG) to Asia are priced.     Following is a table of Saudi Aramco's contract prices of propane and butane per tonne in U.S. dollars.      MONTH    PROPANE            BUTANE  Aug '12     775                775 Jul '12     575                620 Jun '12     680                765 May '12     810                895 Apr '12     990                995   Mar '12   1,230              1,180    Feb '12   1,010              1,040       Jan '12     850                910          Dec '11     770                820                   Nov '11     750                810             Oct '11     735                815                Sep '11     790                865                 AUG '11     835                885                  Jul '11     815                855                   Jun '11     855                925                     May '11     945                995                  Apr '11     875                890                  Mar '11     820                860                  Feb '11     820                810                  Jan '11     935                920         (Reporting by Osamu Tsukimori;Editing by Clarence Fernandez)  ((osamu.tsukimori@thomsonreuters.com)(81-3-6441-1857)(Reuters Messaging: Reuters Messaging: osamu.tsukimori.thomsonreuters.com@reuters.net))  Keywords: SAUDI PROPANE/PRICE