Statistics of level 5 packages for Bulgarian in unstable:
Read http://d-i.alioth.debian.org/l10n-stats

Outdated:

Translated:
  apt/po/bg.po 536t [Damyan Ivanov]
  dictionaries-common/debian/po/bg.po 28t [Yavor Doganov]
  console-common/debian/po/bg.po 24t [Damyan Ivanov]
  newt/newt/po/bg.po 4t [Ognyan Kulev]
  debconf/po/bg.po 71t [Damyan Ivanov]
  debconf/debian/po/bg.po 16t [Damyan Ivanov]

Missing files:
  aptitude/po/bg.po 1144u
  console-common/po/bg.po 13u
  dpkg/po/bg.po 984u


Global statistics: 679t0f0u (24%)     (total strings: 2820=100%)
(From all bg.po files)