114According to settled case-law, the question whether the length of an administrative proceeding is reasonable must be determined in relation to the particular circumstances of each case and, in particular, the background to the case, the various procedural stages followed, the complexity of the case and its importance for the various parties involved (Case T-73/95Oliveira v Commission [1997] ECR II-381, paragraph 4; Joined Cases T-213/95 and T-18/96SCK and FNK v Commission [1997] ECR II-1739, paragraph 57; Joined Cases T-180/96 and T-181/96Mediocurso v Commission [1998] ECR II-3477, paragraph 61; and Case T-182/96Partex v Commission [1999] ECR II-2673, paragraph 177).