translate English to French: In a second round, therefore: ⇒ 2,875 people who had already participated in the survey but had failed to complete the questions received an e-mail requesting them to do so; and ⇒ 20,350 people who had failed to respond to the e-mail sent in the first round received an e-mail requesting them to answer the questions.
Environ 65 % des dossiers étaient complets.