Everlasting tonic drop rate.

Hiya.
Just wondering, does anyone know the odds of an everlasting tonic dropping from the Z-Chest. I checked wiki for a chart of people inputting their data on tonic drops, but it's abit to general.
If anyone has done any drop rate research or can link me to somewhere where people are recording every everlasting drop they know of/heard of, that would be great.
Just curious is all.

Thanks.

low

12char

really low imo

try looking here at these results
http://guildwars.wikia.com/wiki/Drop_rate/Zaishen_Chest

i think he already did

he asked for the link, and that is the link.....if he has already looked at it why would he be asking for the link?

Low, but the monthly tonics are higher than the other ones.

0 for me from 1780 keys

i also watched my guildy open 900+ keys and she didnt get one.