Sample of 22 GRBs analyzed (blue points) among the 91 events (red points) detected in the LLE energy range (30–100 MeV), in 10 years of Fermi activity, according to the LAT catalog. We selected the events applying a cut on the GBM fluence in the 10–1000 keV energy range and a cut on the significance of the signal in the LLE data, both represented by the two black dashed lines. The red point falling in the selected region represents GRB 090926A, which has been excluded from the selection (see the text for an explanation).