59th
So it looks like the name Jason is the 59th most popular name on the planet.
If you are a info whore you are going to love http://www51.wolframalpha.com/, from the creator of Mathematica this website can be used to answer or compare anything, try it yourself and see what you can learn.
And I mean anything looking for the population of a town, enter the name, looking for GDP values from 40 years ago enter that, you can enter anything you want (formatted right) and you can get information.
