greenrift
Agreed with previous sentiments. Are these overall or monthly figures you are wanting?
My personal experience:
Uploaded my first homebrew app in October 2009. Released a few others between then and now. The original app on the Google Play (Android Market) was released as a pay version as well as a free (ads) version. The free version is almost past 700K downloads while the pay version has done a small fraction of that (respectable, but not life changing).
Overall counts across all my apps and all markets (Amazon, Gooogle, Nook), total app downloads (free and pay combined) is over 1 million.
These apps are made by one person (me). For my next app, I'm contracting out the graphics in order to try to step things up a notch as I branch out into the iOS world.
Here are some links to the apps: Google Play: http://goo.gl/7iXKB Amazon: http://goo.gl/kyyGs Nook (B&N): http://goo.gl/gkQZk