Initiative Percent Complete Field

[Stephanie Hansen]

I am using the API Connector to create Power BI reports with Jira data.  

In a JIRA view we call the DFDS, I can show an initiative and a "percentage complete" which is (maybe?) the Progress against story points completed against the story points estimated. 

Is there a field that I can map to to show this percentage, on either the Initiative (preferred) or Epic level? 

I do not see one, all of the possible fields on any initiative or epic are 0.0 as far as I can see.