CIA Factbook The World Factbook 1994: Sri LankaDefense Forces Branches: Army, Navy, Air Force, Police Force Manpower availability: males age 15-49 4,906,666; fit for military service 3,825,774; reach military age (18) annually 178,213 (1994 est.) Defense expenditures: exchange rate conversion—$417 million, 3.5% of GDP (1994 est.)