(A) The ECDF of F_g1 is given in red, computed for only the 22 years without GLE events. The grey lines show 100 bootstrap estimates of the F_g1 ECDF, computed by randomly sampling 22 years from the F_g1 series. Panel B has the same structure as panel A, but instead shows the ECDF of F_r1 in blue. Panels (C) and (D) have the same structure as (A) and (B), but instead show the ECDFs of F_g1 and F_r1 from only those 19 years with GLE events.