The majority of the world’s top 100 blogs are using WordPress, according to a new report from Pingdom, and the content management system’s share of these blogs is on the rise.

According to the firm, 52% of these blogs are using WordPress, up from 48% a year ago.

To come up with the top blogs, Pingdom looked to Technorati, which is famous for its annual State of the Blogosphere report, which has transformed into the “Digital Influence Report“. It’s worth noting that Pingdom was only able to identify the platform in use by 94 out of 100 sites.

As you can see, the next largest piece of the pie comes from custom systems, followed by Drupal, N/A, Gawker, BlogSmith, Movable Type, TypePad, Blogger, Ceros, Joomla, and Tumblr.

Considering Tumblr’s rising popularity in recent months, it’s interesting to see it carry such a small percentage here (1 site).

TypePad has increased from two sites to four sites, while Movable Type decreased from seven to four. Drupal dropped by one site. Google’s Blogger gained one site, reaching three.

Here’s the list of blogs, and which platform each uses: