Currently "old charts" reports show statistics only since 2010-01-20, e.g.
https://bugzilla.wikimedia.org/reports.cgi?product=Wikimedia&datasets=UNCONFIRMED&datasets=NEW&datasets=ASSIGNED&datasets=REOPENED&datasets=VERIFIED&datasets=LATER&datasets=REMIND .
Bugzilla was upgraded the day before: https://wikitech.wikimedia.org/view/Server_admin_log/Archive_15#January_19
collectstats.pl populates such statistics: http://www.bugzilla.org/docs/tip/en/html/extraconfig.html
collectstats.pl --regenerate is supposed to populate them for all time and should be fast enough in currently installed version (4.0): http://www.bugzilla.org/releases/4.0/release-notes.html#v40_feat_other
Version: unspecified
Severity: normal