The company was very profitable in these years (and did not need the extra funds to function), did not get bank loans (so did not benefit from a better creditworthiness) and did not make particular acquisitions.
Plus précisément, les cas où un opérateur postal est exposé à un niveau de risque important se voient appliquer la fourchette [MDE 5,4-7,4 %], tandis que la fourchette [MDE 3,6-4,8 %] correspond aux cas de faible risque.