When breaking down the commits to the domain names, Tungsten Graphics and VMware are the top contributors, as expected. Behind Tungsten Graphics / VMware is Gmail.com, which is used by many open-source contributors regardless of their employer. The fourth most popular domain is Anholt.net, which is the personal domain of Intel's Eric Anholt. In fifth is Intel and sixth is Red Hat.
The file count of Mesa has steadily increased over the past decade.
The line count has not increased in mesa as rapidly over the long-term, but in 2010 there was a large increase before ultimately being reduced.