CIA Factbook The World Factbook 1994: Costa RicaDefense Forces Branches: Civil Guard, Rural Assistance Guard • note: constitution prohibits armed forces Manpower availability: males age 15-49 873,987; fit for military service 588,223; reach military age (18) annually 32,308 (1994 est.) Defense expenditures: exchange rate conversion—$22 million, 0.5% of GDP (1989)