Drupal is 10 years old today - an amazing feat for an open source project. Congratulations you have created a fantastic product. Thank you Drupal Community for rallying behind a good structure and making it great. Thank you and the GNU licence for facilitating the encouragement and legal license. Just to think that an average business failure rate 80% over first five years, and 80% over the following five years, the fact that an open source project has survived this long and is supported by a thriving community of thousands of developers and hundreds of thousands of impressive installations.

Drupal 7 usage jumped to 20,000 installations this year already based on statistics on the drupal.org usage statistics site.
Drupal experiences 50% growth in 2010
Looking at perhaps the most famous GNU project - the LInux project - Drual rate of adaption is amazing. When Linux turned 10 years old the rate of Linux server unit shipments recorded a 15% annual growth rate.  Drupal recorded a 50% growth rate last year.  Granted that adaptation of a CMS may be easier than server installs and Drupal has probably made great striedes at improvement of usage reporting, nevertheless the growth is impressive.  Salud, mazoltov, nazdrovie, prost Drupal!