The Thai Armed Forces have a combined manpower of 306,000 active duty personnel and another 245,000 active reserve personnel. The head of the Thai Armed Forces (จอมทัพไทย, ''Chom Thap Thai'') is the king, although this position is only nominal. The armed forces are managed by the Ministry of Defence of Thailand, which is headed by the Minister of Defence (a member of the cabinet of Thailand) and commanded by the Royal Thai Armed Forces Headquarters, which in turn is headed by the Chief of Defence Forces of Thailand. Thai annual defense budget almost tripled from 78 billion baht in 2005 to 207 billion baht in 2016, accounting for approximately 1.5% of 2019 Thai GDP. Thailand ranked 16th worldwide in the Military Strength Index based on the Credit Suisse report in September 2015.