> We don't know how many of Clinton's top IT aide's e-mails were official government records.

When I was a federal employee we took yearly training on this exact topic and the rules for what qualifies as a federal record are surprisingly inclusive. The few exclusions include emails that are purely personal and announcements sent to a wide audience.

> Speculation & Proposition: Since he worked to set up an extra-governmental private server which could potentially be used to hide governmental records, that number should be strictly greater than zero.

If an email came from the Secretary, yes. But other than that, no.