A quick summary of the most prevalent mask character compositions it can be seen these passwords most likely have an Asian country influence. I mention this tendency in my manual Hash Crack that Eastern country users preference for using digits in their passwords. This has two simple explanations in my opinion:

1) Asian cultures tend to value numbers for personal, religious, national, or cultural significance.

2) Due to encodings, character creation, and universal use of Latin characters for most websites, it makes more sense to steer towards the use of numbers for compatibility and recall.