E.g. http://www.census.go..._and_imports.html

It looks like agricultural exports were $96.6B in 2009.

I didn't find a good list of manufactured exports in my searching for that post. It says "goods", and it's likely that they're distinguishing between "goods" and "services" as opposed to "manufactured goods" versus all hard exports.

I dunno.

Cheers,
Scott.