Reporting on salary/wage history contained in a taleo applciation

Summary

Need help finding out if and/or where I can find wage history in OBI so I can build a requested report.

Content

I have been asked to create a report that shows the last wage of a candidate based on information contained in their submission.  I have tried in vain to find the element to pull into our report.  Does anyone have any idea on how I can find out:

1) if I am able to report on the wage history contained in a Taleo submission, or

2) if there are steps needed to make wage history reportable, or

3) if this is not an option.