Right now, there are around 2.5 million drones that regularly fly over American skies, according to the Federal Aviation Administration. In 2020, that number could almost triple, with 7 million drones projected to be active in the skies over our heads, according to a new report) released by the agency today.

Of the drones currently buzzing around, they're split between roughly 1.5 million hobbyist drones and 500,000 commercial (the later being flown by companies for moneymaking purposes). But as that number increases, it will shape U.S. aerospace for decades to come.

That's one of the more interesting conclusions to emerge from the FAA's aerospace forecast for 2016 to 2036. An annual report, it's always an attempt to capture the next twenty years of sky trends. Here's the big finding about drones, which the FAA phrases as "unmanned aerial systems," or UAS: