An EPA memo lists the average annual usage of glyphosate on US crops from 2004-2013. This average isn't useful because glyphosate use has gone up so high in recent years. The memo also lists the average percent of that crop treated, and max percent crop treated.
These are estimates only, and subject to being very underreported. I actually don't see a single crop that ISN'T sprayed with glyphosate.
EPA memo on Google Drive. This only covers pesticides with a SINGLE active ingredient. There are many more pesticides which have to use a combination of active ingredients because glyphosate has been making superweeds.