can I download the list of approval contributors?

Hello.

I just downloaded xml translation files from my project, and it appears it only shows the translators for each context.

When I uploaded the files, the translator names were set as me. whole context's like translated by me. I had to make people to approve those.
when we're done to approve things, I found out none of approvers' name is there after I downloaded it.
sometimes I see contributor's name, but It's only when they mistook to click "translate" button instead of "approve" button. "translate" then "approve" button order remains their name, but It seems only "translate" button does that function.

I mean, the translator’s names for each context are as me or nothing. I thought approvers name would be there.

is there any possible way to have whole approver's name list? though It's listed in history, like someone approved it.

if I question this as other word, can I download change history of each context?
I was supposed to calculate approver's contribution... so I'm really serious. I hope there's a way... thank you.

(user version: current translate.zanata.org)