 The <unk> Port Authority was established in 1981 . It started port operation in 1983 at <unk> <unk> . Following a <unk> exercise , <unk> Port <unk> <unk> ( <unk> ) was founded on 23 December 1992 and commenced operation on 1 January 1993 . <unk> is currently responsible for regulatory exercises and security of the port . Meanwhile , <unk> is responsible for cargo handling at the <unk> International <unk> Terminal ( <unk> ) . The port also provides Vessel traffic service to shipping vessels . The annual total cargo <unk> is 45 @.@ 4 million tonnes , consisting of 58 % <unk> and 42 % non @-@ <unk> products . As of 31 December 2014 , it generated a total revenue of <unk> <unk> @.@ 3 million per year . <unk> Port is the busiest port in <unk> . 
