The armed forces of Bulgaria consist of 68,450 active personnel with reserves numbering 303,000. In 2002 the army numbered 31,050, the navy some 4,379 and the air force 17,780. Equipment included 1,475 main battle tanks and 232 combat aircraft. There were 34,000 members of the paramilitary, including border guards, security police, and railway and construction troops. Bulgaria participates in two peacekeeping missions abroad. Defense expenditures were $356 million in 2002 or 2.7% of GDP.