According to the 2008 USAF Almanac, the total number of aircraft in the USAF was 5,778 in 2007.
Approximately 1,473,900 active duty personnel, with 1,458,500 in reserve components, 580,049 civilian workers, and an estimated 118 million fit for military service in the event of a draft.
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Fail. its 11.
3,572 Source: http://www.dailymail.co.uk/news/worldnews/article-1225806/Fort-Hood-shootings-Muslims-U-S-Army.html#ixzz0W6GbzEJ0
Including active duty, and reserves, around 2 million or so, percentage wise its less than 1%.