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\bibitem{Mueller_etal2008} M{\"u}ller, S., Sch{\"u}pbach, S., \& Kucera, J. (2008). \textit{Statistique des assurances sociales suisses 2008 : compte global, r{\'e}sultats principaux, s{\'e}ries AVS, AI, PC, PP, AM, AA, APG, AC, AF}. Berne: Office f{\'e}d{\'e}ral des assurances sociales (OFAS).

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