I want the Hina (Dress) character, so why did I get so many 3-star characters??? | Blue Archive!

I got her in 156 pulls! This gacha system is different from others. It's not 50/50 or guaranteed. Please don't mind my signature. I'm so bad at handwriting using a mouse.
I just counted the 3-star characters, and the total is:
(Each 10 pulls and then a total of 160 pulls)
0 + 0 + 2 + 0 + 1 + 0 + 2 + 1 + 2 + 1 + 0 + 1 + 2 + 0 + 0 + 1 = 14 three-star characters!!
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