Davis-Monthan Air Force Base in Tucson reports that its operations had an estimated total economic impact of $973 million in the 2013 fiscal year.

That’s down from about $1.14 billion in the 2012 fiscal year.

Including the effect of local military retirees, Davis-Monthan officials say the base pumped $1.47 billion into the Tucson-area economy in fiscal 2013. That total is down from $1.63 billion in fiscal 2012.

More than 10,000 military personnel and civilians worked at Davis-Monthan last year, including more than 7,500 service members and nearly 3,000 civilian employees and contractors.

The annual economic impact released Thursday includes the base’s payroll and spending on equipment, supplies and construction, plus a multiplier to estimate indirect effects like job creation.