540Repeated infringement must be viewed, according to settled case-law, as a circumstance that may be in the nature of an aggravating circumstance (see, to that effect, judgments of 11 March 1999, Thyssen Stahl v Commission, T‑141/94, EU:T:1999:48, paragraph 618, and of 11 March 1999, Unimétal v Commission, T‑145/94, EU:T:1999:49, paragraph 585).