On the face of it it doesnt seem unusual. I think you would need more info (such as total number of draws or where those numbers came in the ranking).
But those proportions could fit a normal distribution.
Consider this; what are the chances of each number in a lottery being picked the same number of times? VERY, VERY small (almost impossible)
Even the simple example of a die gives a chance of less than 2% that you could roll one of each number once in 6 throws. Whereas the chances of getting a 'lucky' number peaking with 3 occurences are about 12%. Randomness happens.