Earlier this week Andre Klapper shared the annual GNOME Bugzilla statistics for 2013. The GNOME project ended out 2013 with 46,130 open bug reports, compared to 43k bug reports at the end of 2012 or 44k bug reports at the end of 2011. Of the 46k bug reports open at the end of 2013, 25k of them were opened in 2013 while 22k were closed in 2013.
The large difference in bug reports for 2013 comes down to nearly one thousand open tickets on the Shotwell photo program and the Geary project caused a difference of one thousand bugs by importing their bugs from the Yorba bug system.
There were five GNOME developers who closed more than 500 bugs each in 2013: Matthias Clasen, André Klapper, Bastien Nocera, Sebastian Dröge, and Florian Müllner. There were also seven individuals who each reported more than 250 bugs in 2013.
Eight GNOME developers each contributed more than 250 patches to GNOME in 2013 while there were seven individuals who reviewed more than 500 patches in 2013. There's quite a lot of overlap in the developers between these different lists.
For those interested in the GNOME bug statistics for 2013, the findings are published to the GNOME desktop-devel-list.