Stack Exchange released an infographic that provides that looks into all the growth the company has seen in 2011, including the funding it raised and the surge in monthly visitors among other things.

The company started branching out into the Q&A space in August 2010, prior to the name change when it was still Stack Overflow.  Overflow’s freshly launched network of topic-specific question and answer sites was viewed just over 43 million times that month by 12 million unique visitors. These figure have ballooned to 83.5 million and 19 million respectively by January 2011, and in December last year Stack Exchange sites have been visited 152 million times by 32 million different users.

Quality is the main thing Stack Exchange and others have credited for the network’s success. An average of 93 percent of all questions posted on the different sites received an answer; which is a very high ratio when considering Stack Exchange’s policy. A reply is only counted as an answer if the asker has accepted it, or if another user gave it the thumbs up. Surprisingly, this represents an increase over time rather than a decline, which would be the more likely outcome in light of the network’s rapid growth.

Our own Kit Dotson covered Exchange’s funding round back in March, when the company took the opportunity to change its name. An average of about 20 percent of all questions raised on the different sites remained unanswered last year, compared to today’s less than 7 percent.

Stack Exchange is growing, but it’s not the only Q&A service that’s expanding its turf. ChaCha recently teamed up with Dexetra, a mobile AI maker, to increase the IQ of the latter’s Siri competitor.