Military branches:
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National Defense Secretariat (Sedena) (including Army and Air Force), Navy Secretariat (including Naval Air and Marines)
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Military manpower - military age:
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18 years of age (no conscription; all-volunteer force)
note: starting in 2000, females were allowed to volunteer for military service (2004 est.)
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Military manpower - availability:
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males age 15-49: 27,374,153 (2004 est.)
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Military manpower - fit for military service:
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males age 15-49: 19,755,614 (2004 est.)
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Military manpower - reaching military age annually:
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males: 1,055,368 (2004 est.)
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Military expenditures - dollar figure:
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$5,168.3 million (2003)
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Military expenditures - percent of GDP:
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0.9% (2003)
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