With another 12 Hirogen boxes opened (key sale incentive), I now have results on 44 boxes, so I have also included percentages for chance of a specific item drop:
Federation:
(4x) Destabilized Tetryon weapon pack (9.09% FED, 31.82% overall)
(1) Gamma Quadrant DOff cadre (2.27% FED, 11.36% overall)
(3) Gamma Quadrant DOff mini-pack (6.82% FED, 18.18% overall)
(1) Preferred Rich Dilithium mining claims (6-pack) (2.27% FED & overall)
(1) Genetic Resequencer (space) "Hot Pursuit" trait (includes repec) (2.27% FED, 4.54% overall)
(1) Mirror Universe Heavy Cruiser refit (2.27% FED & overall)
(1) 500 Reputation Mark bonus (2.27% FED & overall)
76 Lobi (12 total boxes) (6.33/box)
KDF:
(4x) Destabilized Tetryon weapon pack (9.09% KDF, 31.82% overall)
(2x) Gamma Quadrant DOff mini-pack (4.54% KDF, 18.18% overall)
(1) Gamma Quadrant DOff cadre 2.27% KDF, 11.36% overall)
(1) Alpha Deception Field Console (2.27% KDF & overall)
(1) 2k CXP bonus pack (2.27% KDF, 4.54% overall)
(1) Genetic Resequencer ("Hot Pursuit" space trait, incl. Respec) (2.27% FED, 4.54% overall)
54 Lobi (12 total boxes) (4.5/box)
Rom/KDF:
(3x) Destabilized Tetryon weapon pack (6.82% Rom/KDF, 31.82% overall)
(1) Gamma Quadrant DOff cadre (2.27% Rom/KDF, 11.36% overall)
(2) Gamma Quadrant DOff mini-pack (4.54% Rom/KDF, 18.18% overall)
(1) 2k CXP bonus pack (2.27% Rom/KDF, 4.54% overall)
(1) 100 Reputation Mark Bonus (2.27% Rom/KDF, 4.54% overall)
(1) Genetic Resequencer (ground) "Hunter Trait" (includes repec) (2.27% Rom/KDF & overall)
(2) Mirror Universe Dhelan Warbird refit (4.54% Rom/KDF & overall)
67 Lobi (12 total boxes) (5.58/box)
Rom/Fed:
(3x) Destabilized Tetryon weapon pack (6.82% Rom/FED, 31.82% overall)
(2) Gamma Quadrant DOff cadre (4.54% Rom/FED, 11.36% overall)
(1) Gamma Quadrant DOff mini-pack (2.27% Rom/FED, 18.18% overall)
(1) Hirogen Predator DOff (purple) (2.27% Rom/FED & overall)
(1) 100 Reputation Mark bonus (2.27% Rom/FED, 4.54% overall)
39 Lobi (8 total boxes) (4.88/box)
So, if you're using Hirogen boxes to get Lobi, do it as a FED captain; they seem to have the best yield...