I don't know.
Definitely more than I write, though. I am very slow to publish. Mainly because I am a perfectionist and let unfinished hubs stew for a long time before I publish.
So don't be discouraged if you're one that doesn't seem to crank them out like everyone else. Just keep doing what you can do, and you'll get there eventually.
Oh, and welcome to HubPages! You seem to be off to a great start!