Machine Translation Provider - collect final target segment

Dear all,

we use a custom machine translation provider plugin with Trados Studio 2011 / 2014.

For statistical purposes, it would be very interesting to be able to collect usage data, in particular following combination:

(1) source segment

(2) target segment (suggestion from MT) 

(3) final segment / (and ideally whether MT has been used)

1 and 2 can be collected inside the provider plugin, however I did not find out yet how to get the data for (3).
Can this be done, even with a second plugin / customization?

Thank you for pointing me in the right direction,

Michal