There's an implied upper bound or they would have used a more extreme term to play it up even further. 18,000 times a year is "dozens", but you're going to say

There's an implied upper bound or they would have used a more extreme term to play it up even further. 18,000 times a year is "dozens", but you're going to say "thousands of launches per year" if you're conservative and "tens of thousands" if you're a little more daring.