Crossfire Permanent Crate weapon chances

This thread is made for the general public and I want to find out the approximate win percentages of Crossfire Crates so if u have any info post it in the following format:
Names of Crate-number of perm won from crate/total number of crates bought

I'll review the information after i feel there is enough data and make a chart of percentages

here are the crates I've bought so far
M4A1 Custom-0/20
AWM Red Dragon-0/40
Kriss Super V-0/10
AK 47 Camo-1/30
Anaconda Adv-1/10
D.E Camo-0/40
XM8 Adv-0/10
MSG90-1/10
Thompson& Winchester- 1/30 (Tommy)
Aug Camo-1/20

Hope everybpdy helps Thank you all !!!!!!!!!!!

I saw a man that bought over 120 crates (idk which one) and he doesnt won a single perm from it.