When people learn I do voicework, that's the next sentence most say. And truthfully, I rarely can answer. It's an odd business. You do this and that, sometimes (like today) only part of something in which the other pieces don't yet exist, and when the piece shows, it may be for 'internal use' or at a convention of sales people or whatever. I rarely hear the finished version. Also, it's a global business. I've done stuff for as far away as South Africa. I would think there's be more commercial work, but commercials are just a small part of it. Some is acting, some is narrating.
I know a guy who was the voice of Benjamin Franklin at The Franklin Institute in Philadelphia - my understanding is there's this sort-of-statue which comes alive and greets visitors. That's Dave.
Today the business runs on auditions. Getting the work is really the job - doing the voicework is the easy (and often fun) part.