Android Market Passes 50,000 Apps!

It is great to see the Market grow but keep in mind, they count everything when they say 50.000. apps. That number includes themes, add-ons, even the useless, sub-par apps and what-nots, not all of those are truly and/or good, useful applications. However, growth is still very nice! Here's to the 50k mark, lets set our sights on 100k now! App Store bevare, here we come! :p
 
I'm going to be new to android. Give me a rough estimate percentage wise how many of these apps are useless? I know this is a unique answer to each person just trying to get an idea since currently we are unable to view the catalog online. I know I was watching today and we will be able to soon.