Ten years ago, most people were not aware of blogs and blogging. Today, however, blogging is a mainstream phenomenon. While it doesn't get the same hype as Twitter and Facebook today, there are still millions of blogs and bloggers out there. Looking at almost 100 million blog posts in its database, social media monitoring and analytics firm Sysomos created a mini-census of today's blogosphere. Specifically, Sysomos looked at the age, gender and location information attached to these posts.

Age

The average blogger today falls into the 21- to 35-year-old demographic. Indeed, this group accounts for a little bit more than half of all blog posts in the company's database. Bloggers under the age of 20 account for about 20% of all posts, and bloggers between 36 and 50 account for another 20%. Bloggers over 51 only account for 7.1% of all posts.

Gender

The blogosphere represents a very balanced gender distribution, with women accounting for about 51% of all posts and men accounting for 49%.

Location

The vast majority of bloggers still reside in the U.S. (29.2%), followed by Great Britain (6.75%), Japan (4.88%) and Brazil (4.19%). In the U.S., California plays host to the largest number of bloggers (14.1%), followed by New York (7.16%) and Colorado (5.25%).

These numbers, of course, are skewed, as they don't take the relative size of these countries and states into account. It would be interesting see these numbers on a blogger-per-capita scale.