For that indicator, The Stockholm International Peace Research Institute provides data for the USA from 2010 to 2012. The average value for the USA during that period was 4.63 percent with a minumum of 4.4 percent in 2012 and a maximum of 4.8 percent in 2010.
See the global rankings for that indicator or
use the country comparator to compare trends over time.
The entire data set can be obtained at sipri data.
Definition: Military spending includes expenditure on peacekeeping, defense ministries, paramilitary forces, and military space activities. Also: military and civil personnel, including retirement pensions; operations and maintenance; procurement; military research and development; and military aid. Defense and current expenditure for past military activities, such as for veterans' benefits, demobilization, conversion, and weapon destruction, are not included.