I've received 14 male skin shards and 0 female skin shards in 2019
I've been tracking my loot from hextech chests and so far in 2019 I haven't received a single skin shard for a female champion. I've received 14 skin shards for male champions. What's going on?
A little math: I count 570 male skins and 320 female, going by the rules listed on the wiki (Between 520 RP and 1820 RP). I'm probably off by a few, but close enough. (570 / (570+320))^14 = 0.00195. In other words, that should happen less than 0.2% of the time.
So am I just having bizarre, 1-in-500 luck, or is there some other reason this is happening?