Military

Military branches:	Army, Navy (includes naval air arm), Air Force, Coast Guard (2008)
Military service age and obligation:	16 years of age for voluntary military service; no conscription (2008)
Manpower available for military service:	males age 16-49: 301,094,084 females age 16-49: 283,047,141 (2008 est.)
Manpower fit for military service:	males age 16-49: 231,161,111 females age 16-49: 236,633,962 (2008 est.)
Manpower reaching militarily significant age annually:	males age 16-49: 11,592,516 females age 16-49: 10,636,857 (2008 est.)
Military expenditures - percent of GDP:	2.5% (2006)