translate English to French: Mean recovery rates in the 1990s were about one-quarter of what they were in the early 1970s, as predicted by the arguments in Section 2 of this paper.
Le taux moyen de rÃ©cupÃ©ration dans les annÃ©es 1990 a Ã©tÃ© d'environ un quart de ce qu'il Ã©tait au dÃ©but de la dÃ©cennie 1970, comme les arguments prÃ©sentÃ©s Ã la section 2 du prÃ©sent mÃ©moire l'avaient prÃ©vu.