Apparently it is their system to spread them around the country rather than to concentrate in certain States.
It’s not only that the scholarships are spread around the various states. It’s also spread out over the world to expatriates. For example, when my eldest child first took the test, we were living in the Philippines. Our region of Asia had the HIGHEST cut-off score in the world. He made Semi-finalist there, and would have made Finalist most any place else. Then, because he was so young, the next year we discovered that he could take the test again (now in the United States), as long as he didn’t go immediately into university. He did, and received a lovely Finalist Scholarship—still aged only 16. Can you tell I’m proud of him?