More specifically, the index decreased by as much as 9 % between 2007 and 2008, but already in 2009 it rebounded by 1 percentage point and increased by another 7 percentage points in the IP.
Plus précisément, l’indice a fléchi de 9 % entre 2007 et 2008, mais a regagné 1 point de pourcentage dès 2009, puis 7 autres pendant la PE.