How Many Aliens Are There?

I've been waiting for this for years.... I can finally plug numbers into the Drake Equation and get some meaningful answers about whether or not Aliens are visiting earth.
http://www.bbc.com/future/story/20120821-how-many-alien-worlds-exist
My best guess, there are 34 technological Alien species currently active in the Milky Way galaxy. How many do you come up with?